Suggestion	Votes
1. Support for CSS3 overflow-x and overflow-y properties	23
2. quic support or compatibility?	21
3. http://dev.w3.org/html5/spec-LC/history.html#unloading-documents	21
4. I suggest support for TransferableObject types (of which there are several)	18
5. I suggest adding statistics for Aural style sheets which contain CSS properties such as "speak....	18
6. I would like to see document.readyState supported values in the caniuse.com	18
7. css3 animation-play-state please	17
8. CSS3 marquee support.	17
9. The bdi (bidi isolate) element, added in HTML5 to ease inserting RTL text into an LTR page or vice-v...	17
10. The <keygen> tag is a bit of a mess when it comes to support, so it would be quite a useful ad...	17
11. mediagroup content attribute, MediaController object, VideoTrackList, AudioTrackList objects	16
12. Add column-span and column-fill features	16
13. I have just noticed that the onended event of the HTML5 <audio> tag is supported in Firefox 11...	16
14. How about overflow-scrolling? iOS Safari needs the webkit vendor prefix for example. Can't find ...	16
15. Browser support for crossorigin attribute on img/video (as described in ) would be useful	15
16. Soft hyphen: html entity &shy;	15
17. XSLT Support table	15
18. input[autocomplete] (values besides on/off)	15
19. The Output Element	15
20. text-wrap	15
21. Include `baseline-shift` CSS property	14
22. SVGZ-specific support table since iOS < 4.2 doesn't support it, but does support SVG. Not su...	14
23. Add theme-color Meta Tag	14
24. css/svg property dominant-baseline	14
25. CSS3 Template Layout	14
26. Show browser support for CSS border-collapse and border-spacing (and there might be other table-rela...	13
27. requestAutoComplete	13
28. CSS3 min() and max() functions as values for properties that accept <dimension> as a value.	13
29. https://developer.mozilla.org/en-US/docs/Web/Events/wheel	12
30. Built-in PDF viewer support	12
31. I couldn't find a compatibility table for animation-fill-mode. Currently needs browser prefixe...	12
32. device-cmyk css feature	12
33. Please add support tables for x-xss-protection security header. Thanks!	12
34. list-style-type	12
35. I suggest adding information about support for alternate HTTP methods such as PUT and PATCH.	11
36. geo: url support -	11
37. The mouseenter and mouseleave events	11
38. Emoji display support	11
39. What about showing support for various link attributes, like "subresource" or "dns-pr...	11
40. For printing support for the size:landscape option to tell the browser what page orientation we want...	11
41. window.onerror - / - particularly mobile browser support	10
42. Add Array.prototype.includes	10
43. line-height support and the differences in rendering between webkit&trident and other engines.	10
44. Quota Management API	10
45. Check browser support for displaying MJPEG files. This is a motion JPEG file format that is supporte...	10
46. Why do white-space not appear to be in the list? :)	10
47. document.elementsFromPoint	10
48. the withCredentials property in xhr = new XMLHttpRequest() is used to check for XMLHttpRequest suppo...	9
49. WebExtensions (browser extensions)	9
50. Keyboard events (keypress, keyup, keydown, textinput) - see here	9
51. Webkit-based browsers extend the MediaQuery W3C Standard with specific queries for animation, transi...	9
52. Show support table with history as time-based, instead of versions-back-based. With Chrome and IE ve...	9
53. webcl?	9
54. saveAs does not seem to be on the site (or else, I'm just incapable of finding it). It would be ...	9
55. accesskey attribute on non-focusable elements (should cause a click element to fire	9
56. Support for window.scrollX and window.scrollY	9
57. Show results for Firefox ESR (currently 17.07).	8
58. Progressive JPEGs start to show on pages faster, from low quality and eventually getting their 100% ...	8
59. CSS3 Speech Module Which browsers support it? See	8
60. Support for SVG's "shape-rendering" CSS property.	8
61. I'd like to see border-corner-shape added. It would be a nice feature when implemented in browse...	8
62. webM alpha transparency	8
63. CSS3 module "Generated Content for Paged Media" and especially the target-counter function	8
64. Entries for href values including `tel:1234567` and `sms:1234567`	8
65. script tag onerror attribute	8
66. Embedded color profiles in JPEG images.	7
67. column-span and other column-* proprieties of CSS3 Multi-column layout module	7
68. Add support for CSS's @import	7
69. Support for list-style-type	7
70. list-style-image	7
71. clipboardData: text, rtf, html, image, etc.	7
72. Track document.registerElement I think a test just to see if it is defined would be sufficient. It...	7
73. Add navigator.mediaDevices	7
74. Add browser support for text-decoration-skip [ - Not sure if any browsers support it yet, but someth...	7
75. blink tag	7
76. Based on this page I suggest to add addRule and insertRule Thanks	7
77. break-inside for columns.	7
78. Add System Info API	7
79. Add nextElementSibling	7
80. I would like to know which browsers support the forceSpellCheck() method (	7
81. DataChannel WebRTC JS API	7
82. CSS image() functional notation (e.g. for background-images etc). See	7
83. Geofencing API	7
84. domElement.style.setProperty()	6
85. TCP Fast-Open. Now that Linux kernels enable this by default (and web servers likely won't be ...	6
86. X-Content-Type-Options: nosniff	6
87. Web NFC API	6
88. draggable option	6
89. location.origin	6
90. CSS <angle> - particularly the "turn" unit	6
91. DNS-based Authentication of Named Entities (DANE)	6
92. http://www.w3.org/TR/html-json-forms/	6
93. font-variant-numeric	6
94. Can I use ECDSA certificates?	6
95. "GeometryUtils" - part of the CSSOM. Provides much better position information than existi...	6
96. SVG Foreign Object is a way to combine different XML namespaces elements into the SVG.	6
97. ECMAScript 6 collection: Set	6
98. HttpOnly flag for cookies, what browsers support? it would be nice to have that in the caniuse.com	6
99. Dialogs implemented using separate documents window.showModalDialog()	6
100. Which browsers support colgroup completely?	6
101. Bitmap images inside SVG files. Some browsers that support SVG, will not show embedded bitmap image...	6
102. html5 canvas.toblob	6
103. The 'media' attribute from the source element for HTML5's audio and video elements. Thi...	6
104. Add browser support for toggle()	6
105. Browser support for RTP streams?	6
106. The "auto" value for the dir attribute, added in HTML5 to ease inserting text of unknown d...	6
107. More details on File Blobs	6
108. Javascript: Array.prototype.fill()	6
109. Object.assign	6
110. Scheme-less URIs, aka the relative URIs. See	5
111. Add more CSS3 media query sub-types: e.g. 'orientation' and 'aspect-ratio'	5
112. WeakMap API	5
113. "click" function on anchor DOM element (a)	5
114. add "HTTP status code headers"	5
115. vector-effect	5
116. getElementsByName	5
117. empty-cells (	5
118. Please add "imageSmoothingEnabled". Chrome supports it unprefixed. IE11, Firefox, and Saf...	5
119. Can I use "onmouseover", "onmouseout"?	5
120. playbackRate in video	5
121. Why don't we add quotes property?	5
122. Load event support on link nodes to show when a stylesheet is finished loading. See for a discussio...	5
123. MediaStream Recording (	5
124. 'caniuse.com' should have small-caps (and other font variants?) broken out as a separate fea...	5
125. <meta name="apple-mobile-web-app-capable" content="yes" />	5
126. designMode	5
127. registerContentHandler(), registerProtocolHandler(), and friends	5
128. HTML5 Events Like onoffline, onpopstate, etc.	5
129. image-rect isn't supported by anybody but Mozilla as far as I can tell, but I'd love it to b...	5
130. "border-corner-shape"	5
131. Textarea wrap attribute (off, soft, hard, virtual, physical)	5
132. Add stale-while-revalidate HTTP header support indication	5
133. EventArgs.buttons is new for mouse events (www.w3.org/TR/DOM-Level-3-Events/#events-MouseEvent-butto...	4
134. Add `navigator.doNotTrack` and DNT support tables	4
135. New feature request: OCSP must-staple	4
136. track element and TextTrack object	4
137. Touch Icons, per	4
138. MouseEvent	4
139. Support for XPath 2.0 (interesting for a lot of new functions, like base-uri(), matches() etc.)	4
140. target-new	4
141. Add supported elliptical curves (HTTPS/TLS)	4
142. lastModified HTML5 DOM property	4
143. user-input	4
144. CSS minmax()	4
145. Messaging API (SMS)	4
146. svg transform matrix	4
147. Add ProgressEvent	4
148. track arraybuffer support for binary websockets	4
149. Add WebDriver	4
150. Add support table for CSP 3.0 compliance	4
151. Add createImageBitmap	4
152. Add browser support info for the HTTP Cache-Control header "immutable" flag	4
153. @host This CSS @-rule applies to the surrounding element of a template. See	4
154. Add: the 'isolation' CSS property	4
155. extend-to-zoom	4
156. Web intents/Web Activities	4
157. rel="next"	4
158. svg @preserveaspectratio	4
159. CSS Shaders -	4
160. Add beforeinput event	4
161. CSS Box Alignment Module Level 3	4
162. feature: track ReadableStream	4
163. Web Authentication (webauthn)	4
164. http://www.w3.org/TR/web-alarms/	4
165. Add prefers-reduced-motion	4
166. Luminosity media query	4
167. form input property "valueAsNumber"	4
168. image-resolution. I've seen this as a good alternative for retina images as opposed to backgro...	4
169. Add table-layout support, whether browers: - implement the 'fixed' layout properly, evenly ...	4
170. .style.setAttribute() Does every browser support it? Sometimes it's hard to know it it's not...	4
171. font-weight: (CSS3) Which browsers support numeric weights (200, 300) as opposed to simply "bol...	4
172. Flag storage that is not available under private mode	4
173. window.Touch support for browsers: - returns the Touch object constructor on touch events supporting...	4
174. Please add :autofill to the DB	4
175. Object.entries feature?	3
176. Add SVG `use` with external reference	3
177. Add support for the svg paint-order property	3
178. Trailing commas	3
179. text-security missing in list of features	3
180. Please add a support table for the CanvasRenderingContext2D.filter property that firefox supports.	3
181. Add current browser support for HTML5 tag "hgroup" (	3
182. Support SVG width/height = auto	3
183. Secure Cookie flag	3
184. Add event currentTarget property	3
185. @document, as described in &	3
186. The hanging-punctuation property: Currently unsupported by any browser, but it would be nice to ...	3
187. Multicolor Glyph support	3
188. Wake Lock API	3
189. SVG-in-OT fonts	3
190. UI Events builds on DOM Event Level 3, it is specified here	3
191. CSS Property caption-side is missing?	3
192. I suggest you to put browser acceptance of the javascript property clientHeight	3
193. column-break-after atm only via: -webkit-column-break-after	3
194. file input type supported browser	3
195. Would like to see support for XMLSerializer object and document.implementation.createDocument and eq...	3
196. Add 'require-sri-for' CSP Directive	3
197. target-new	3
198. css3 border-color	3
199. CSS "visibility" (hidden/visible/etc)	3
200. ex unit	3
201. Add text-underline-position property	3
202. Add support for FlyWeb API	3
203. Track WritableStream, ReadableStream.prototype.pipeTo, TransformStream, ReadableStreamByobReader	3
204. Add Media Queries Ranges	3
205. Number.prototype.toLocaleString() has no data	3
206. JavaScript Promises.prototype.finally()	3
207. Missing font-synthesis CSS 3 property	3
208. SharedArrayBuffer support	3
209. Input type=email with "multiple" attribute	3
210. `content: leader('.');`	3
211. Add Expect-CT header	3
212. Support for line-break	3
213. longdesc attribute support	2
214. valueAsDate usage	2
215. autocorrect for input fileds	2
216. Add in Range.createContextualFragment	2
217. New feature request: x25519 Key Exchange	2
218. Input type=range with "multiple" attribute	2
219. Feature request: Token Binding Protocol	2
220. UTF-8 Dingbats	2
221. Add transform-box	2
222. Add Cache Storage API / Cache API	2
223. console.assert(boolean_expression)	2
224. Add referrerpolicy attribute	2
225. Content-Security-Policy: script-nonce	2
226. audio / video autoplay attribute and play function	2
227. JavaScript: Tail Call Support information missing	2
228. Add <time> element	2
229. Add save-data client hint	2
230. browserconfig.xml support info	2
231. Support for Multiline Strings	2
232. Please add line-height-step	2
233. Add the "frame" HTML tag : some browsers don't support it !	2
234. Network Service Discovery	2
235. Add Clear Site Data header	2
236. Add ES7/2016 SIMD	2
237. CSS unit 'cap' (cap-height)	2
238. history.scrollRestoration	2
239. strong	2
240. Can I use X3D?	2
241. Add other values of `user-select` property	2
242. Add KeyboardEvent.repeat compatibility info	2
243. HTTP immutable responses	2
244. Firefox cursor:grab & cursor:grabbing	2
245. Add justify-content: space-evenly	2
246. Include the new image format: FLIF	2
247. Animating SVG paths using CSS	2
248. Please add navigator.cookieEnabled	2
249. Cache-Control	2
250. Directional focus navigation: the nav-up, nav-right, nav-down, nav-left properties	2
251. Add classList.replace()	2
252. Date.prototype.toLocaleDateString	2
253. Add AbortController	2
254. Add :any-link pseudo-class	2
255. Add data for AV1 supported browser?	2
256. Add HTTP 103 Early Hints	2
257. Why is there no event constructors?	2
258. Support for nested calc expressions in CSS values	2
259. CSS env() support	2
260. Add `q` (quarter-millimeters) length unit	2
261. Add background-clip: text	2
262. Support for CSS grid's subgrid	2
263. InputDeviceCapabilities API	2
264. Add DNSSEC support	2
265. HTTP Strict Transport Security Preload	2
266. The !important css thing. It's very !important ;).	2
267. CSS.escape()	2
268. SVG viewport-fill-opacity property support	2
269. Hyphenation Options	2
270. img.decode() and decoding attribute	2
271. Browser support for Focus Management function	2
272. CSS 3 property: text-autospace and text-spacing	2
273. XMLHTTPRequest (1)	2
274. Entries API	2
275. SHA2 certificates	2
276. Add :host/:host-context pseudo class	2
277. font-min/max-size	2
278. Individual transform properties	2
279. Support for 'debugger;' in dev tools	2
280. Arithmetic coded JPEG support	2
281. Add suport for MediaDevices.enumerateDevices()	2
282. Add color-mod() | color() function - CSS Color Module Level 4	2
283. Add box-suppress	2
284. The `autocapitalize` attribute of <input>s	1
285. getClientRects	1
286. min/max-device-width/height	1
287. Add High Resolution Time Level 3	1
288. Add: Task Scheduler API Specification	1
289. Lookbehind in JavaScript regex	1
290. support data suggestion: DOM event constructors ?	1
291. Request: nav-up, nav-down, nav-left, nav-right css3 properties	1
292. function.name	1
293. support for "offsetParent"?	1
294. Add `onunload` event	1
295. HTML5 data blocks	1
296. NodeList/HTMLCollection	1
297. caretPositionFromPoint	1
298. What is the support on clear: both?	1
299. embed tag	1
300. Add removeAttribute support	1
301. AnimationEvent support	1
302. Add support for control.labels	1
303. Previous Element Selector	1
304. orientationchange Event	1
305. create @Media Types	1
306. WebGL extensions	1
307. Add support information for the translate attribute	1
308. HTML oninvalid Event Attribute	1
309. HEVC in Safari	1
310. display: table-caption?	1
311. String.prototype.split() with a regex with grouping ( parentheses ).	1
312. Geometry Interfaces Module Level 1	1
313. Indicate which browsers use the HTML5 Parsing algorithm.	1
314. Window setInterval() Method	1
315. [Suggestion] display: fullscreen	1
316. Split background-size from CSS3 Background-image options	1
317. JavaScript Symbol	1
318. getShaderPrecisionFormat	1
319. Suggestion for caniuse.com: Which browsers.versions support multiple tbody elements in a single table?	1
320. image tag	1
321. add micropub	1
322. font-language-override	1
323. Add Media Session API Coverage Information	1
324. css- media-query max-scroll-y	1
325. Video media in image contexts	1
326. Add "Controlling Font Display Per Font-Family via @font-feature-values"	1
327. treeWalker / nodeIterator support needs to be added	1
328. :truncated	1
329. Add support for text-decoration-skip-ink	1
330. Please add support for supported x509 extensions for ʜᴛᴛᴘꜱ certificates	1
331. Add support tables for document.documentElement.clientWidth	1
332. Add Dynamic Module Imports	1
333. Include naviagator.mediaSession and other media related api	1
334. Add Navigation Timing Level 2	1
335. getFilesAndDirectories	1
336. MediaStream Image Capture	1
337. window.prompt, window.alert, window.confirm	1
338. focusNode	1
339. Add Module Preload <link rel="modulepreload">	1
340. Paint Timing API	1
341. Need full 3gp browser compatibility chart.Does it chrome browser supports 3gp format	1
342. ExtendableEvent.waitUntil()	1
343. WebCrypto Key Discovery	1
344. Reflect object	1
345. @document	1
346. IANA time zone names in timeZone option	1
347. CSS page property (for printing)	1
348. .getPointAtLength()	1
349. HTTP content-encoding: zstd	1
350. ::-webkit-file-upload-button	1
351. Javascript pseudoprotocol	1
352. Chained selectors	1
353. Page-margin boxes (@top-center, etc)	1
354. Suggestion: MediaRecorder.isTypeSupported supported types/codecs	1
355. Add information for the webcal and webcals protocols for subscribing to iCalendars	1
356. {row,column}-gap, applied to multicolumn, flex, and grid layouts	1
357. color-gamut media feature from Media Queries 4	1
358. Input Events Level 1 and 2	1
359. Add support for document.queryCommandState	1
360. Add pls pipeline-operator	1
361. Asynchronous Clipboard API (replaces document.execCommand)	1
362. Suggestion: overflow(-[xy])? with 'overlay' value	1
363. Support XMLDocument	1
364. Support data suggestion: `Intl.PluralRules`	1
365. Add raw sockets API	1
366. Native Messaging?	1
367. Consider add 'getRootNode'?	1
368. Support JavaScript Class and Property Decorators (ES Stage 2 Draft)	1
369. Add app-region?	1
370. URLSearchParams.prototype.sort	1
371. Device-Memory Client Hint & navigator.deviceMemory JS API	1
372. Visual Viewport API	1
373. Add <data> element	1
374. Add Web Budget API	1
375. add css property aspect-ratio	1
376. add aria-required to caniuse, if not already there	1
377. aria-current	1
378. Add css-timing	1
379. Feature Policy	1
380. Grid-auto-flow	1
381. Add CSS animation timing function spring()	1
382. Support for CSS3 background-repeat-x and background-repeat-y properties	1
383. CanvasRenderingContext2D.ellipse()	1
384. setTimeout and setInterval callback parameters	1
385. SVG symbols in CSS	1
386. Abortable fetch()	1
387. window.top & window.parent	1
388. Observable	1
389. (function () {}).toSource()	1
390. Support for ImageBitmapRendereingContext	1
391. EventTarget constructor	1
392. Add new SVG filter effects	1
393. grid-template-columns	1
394. Text-overflow level 4	1
395. Keyboard Lock	1
396. Add previousSibling and previousElementSibling	1
397. Server Timing	1
398. Add support for CSS rule @document	1
399. navigator.isProtocolHandlerRegistered and .unregisterProtocolHandler	1
400. Async iterators / for await of	1
401. Content-Security-Policy: block-all-mixed-content	1
402. Add translate attribute	1
403. input setRangeText	1
404. Default function parameters	1
405. x-webkit-speech	1
406. SHA1 certificates	1
407. CaretPosition missing	1
408. Internationalized Domain Name	1
409. Canvas context getTransform() function.	1
410. Magnetometer support	1
411. window.scroll	1
412. Vast & VMAP	1
413. Add visibility: collapse	1
414. attachEvent event handler missing from CanIUse	1
415. Suggestion: Int64 UInt64 (Firefox only AFAIK)	1
416. string-set	1
417. Gyroscope sensor	1
418. Accelerometer sensor	1
419. Add -webkit-touch-callout?	1
420. Please add iFrame element contentWindow property	1
421. Cookies: max-age	1
422. KeyboardEvent.isComposing	1
423. Javascript Built-In MAP	1
424. <video> `playsinline` attribute	1
425. New filesystem api?	1
426. column combination	1
427. document.importNode	1
428. Support setCapture and releaseCapture for mouse	1
429. Add PerformanceObserver	1
430. WindowTimers.setInterval()	1
431. @document CSS	1
432. Javascript - window.onorientationchange	1
433. audio / video .canPlayType(MIMEtype)	1
434. Add support for HTTP header X-Permitted-Cross-Domain-Policies	1
435. Add print-color-adjust	1
436. DeviceOrientation and DeviceMotion events on insecure origins	1
437. The <slot> element	1
438. Audio Output Devices API: wd	1
439. Add media feature display-mode	1
440. Node.isSameNode() and Node.isEqualNode() isn't listed on caniuse	1
441. Add ALPN and NPN notes to HTTP2	1
442. toLocaleString('pt-BR',{style: 'currency', currency:'BRL'})	1
443. Add HTTP 307 & 308 redirects	1
444. Support Tables for Gesture Events	1
445. Add HTTP_ORIGIN feature	1
446. Add float: footnote to CSS3	1
447. video/audio events like loadedemetadata	1
448. Slash-separated color functions	1
449. ImageBitmap	1
450. Add CSS viewport-percentage length units 'vi' and 'vb'	1
451. Add Range.getBoundingClientRect browser support table	1
452. Add support for mediacapture-output API's sinkID	1
453. document type	1
454. Cannot see |ImageCapture| entry in the web interface.	1
455. [CSS Level 4 pseudo-class] :user-error	1
456. SVG sprites with <symbol> and <use>	1
457. Presentation API	1
458. Add XSL to caniuse	1
459. Add support for CSS3 move-to property	1
460. window.navigator.language, .languages	1
461. dblclick Event	1
462. Add support for addHitRegion	1
463. animateMotion for SVG	1
464. String.prototype.padStart	1
465. Add mediaSession API	1
466. Alt-Svc header browser support info: consider adding	1
467. CanIuse @charset "<charset>"	1
468. Support the W3 Web Annotation standard (W3C Recommendation)	1
469. getTotalLength()	1
470. New top level domains (TLD)	1
471. aria-labelledby	1
472. CSS touch-action level 2 values	1
473. Add CSS matrix3d support	1
474. document.referrer	1
475. CSS: overflow-anchor	1
476. Missing `StorageQuota` support	1
477. webshareapi	1
478. add "document.contentType"	1
479. CSSKeyframesRule	1
480. CSS4 - Specifying profiled colors: the color() function	1
481. event.path	1
482. What about Standby API?	1
483. Please track the various HTTP Set-Cookie options supported by browsers	1
484. Encoding API compatibility table	1
485. Support for window.innerHeight, window.innerWidth, window.outerHeight, window.outerWidth	1
486. Add hreflang attribute usage support for link element	1
487. Information about window.location.ancestorOrigins	1
488. CSS tag {content: url()}	1
489. apple-touch-icon	1
490. Add 'animated GIF as favicon'?	1
491. Add ECC certificates	1
492. Please add String.prototype.normalize()	1
493. Inert property for objects that should currently not be focused	1
494. gesturestart, gesturechange, gestureend events for trackpads	1
495. add WebMention	1
496. reflected-xss missing	1
497. add mouse event positions event.offsetX and event.offsetY	1
498. Shape Detection API: Face Detection, Barcode Detection, Text Detection	1
499. Missing a check for msConvertURL() on DragEvent	1
500. SharedMemory/Atomics	1
501. Add "Named function expressions"	1
502. Open search autodiscovery	1
503. add support for Array.prototype.find.	1
504. Please add Progressive web app manifest.	1
505. allowtransparency	1
506. Add data for link rel="alternate"	1
507. Add support stats for String.prototype.repeat()	1
508. SVG viewport-fill property support	1
509. Add CSS text-combine-upright property	1
510. Screen.availLeft	1
511. Add data for imageSmoothingEnabled Property (Canvas-related)	1
512. Can I use selectedOptions ?	1
513. Add CSS display:contents	1
514. Range.surroundContents()	1
515. window.localMediaStream is not listed	1
516. Add window.frameElement to CanIUse	1
517. The xml:space attribute	1
518. show support for namespacing; for example <svg: namespace	1
519. Add compositionstart/end/update event	1
520. Geolocation on non-secure sites	1
521. RFC7692 Compression Extensions for WebSocket	1
522. Add transitionstart event	1
523. support for Performance-Timeline & High-Resolution-Time	1
524. ie behavior	1
525. Function.length / Function.prototype.length	1
526. Feature request: navigator.language	1
527. Add CSS font-synthesis	1
528. Add windows-theme media query selector	1
529. html5 image attribute usemap	1
530. Add HTMLInputElement.select()	1
531. window.addListener()	1
532. srcset/sizes attribute / picture element support in SVG	1
533. filename*=UTF-8''...	1
534. CSS Inline Layout	1
535. window.location.replace	1
536. Support of sms: and mms: in mobile browsers is not clear	1
537. new.target	1
538. SVG 1.2	1
539. event.ctrlKey	1
540. wakeLock	1
541. add onstorage	1
542. background-composite	1
543. Add: window.locationbar window.menubar window.personalbar window.statusbar window.toolbar	1
544. Add WebKit Tap Highlight Color (-webkit-tap-highlight-color)?	1
545. Add web assembly/wasm	1
546. -webkit-box-orient is not found	1
547. Please add XMLHttpRequest.responseURL	1
548. IETF RFCs	1
549. HTMLImageElement.complete	1
550. NetworkInformation.downlinkMax	1
551. Add info about css user-modify and -webkit-user-modify:read-write-plaintext-only	1
552. HTTP2 Server Push	1
553. &euro; and other html codes	1
554. findIndex Array method doesn't added to caniuse.com DB	1
555. Add autocorrect, autocapitalize, autocomplete attributes	1
556. MediaCapture Screen Share	1
557. onerror event on iframe	1
558. Can not search hasAttribute	1
559. Basic Authentication: AuthName directive	1
560. add CSS Extensions meant for renaming	1
561. Can I use Reporting API	1
562. Add support for the HTTP header X-Download-Options	1
563. Add the (view-mode) media feature	1
564. -ms-overflow-style	1
565. Drag and Drop API - move constraints	1
566. Drag and Drop API - ghost image with customizable opacity	1
567. ew-resize	1
568. oncontextmenu	1
569. HTTP Trailers	1
570. ActiveX	1
571. window.event	1
572. Add a footnote regarding HTMLAudioElement	1
573. Object.hasOwnProperty	1
574. Support info for the <track> element	1
575. Add CSS4 Grid structural selectors	1
576. request support for 'accept-charset'	1
577. navigator.connection	1
578. Please add support for getTimezoneOffset()	1
579. stopImmediatePropagation,stopPropagation	1
580. Add <script type="module"> and module workers	1
581. Link headers	1
582. Edge and IE don't support IndexedDB in web workers	1
583. Add ES6 Spread operator	1
584. Please add information about ImageData constructor	1
585. createImageBitmap	1
586. Support for the frame-ancestors directive	1
587. Add `multipart/x-mixed-replace`	1
588. Adding Silverlight usage stats	1
589. Add overscroll-action	1
590. allowfullscreen attribute for iframes	1
591. Which browsers adhere to ETag?	1
592. HTMLElement.offsetTop	1
593. image urls with GET data	1
594. Add Object.prototype.watch method	0
595. HTML5 constraint validation API - setCustomValidity	0
596. marquee	0
597. HTML DOM selectedIndex attribute (drop-down list)	0
598. aria-label	0
599. window.frames list	0
600. window.screen	0
601. Add Object.getNotifier(obj)	0
602. CSS pitch and speech-rate	0
603. documentMode	-1
604. input type password not included	-2