Suggestion	Votes
1. vector-effect	31
2. Add support table for CSP 3.0 compliance	27
3. HTTP content-encoding: zstd	27
4. Suggestion: MediaRecorder.isTypeSupported supported types/codecs	25
5. valueAsDate usage	23
6. Support JavaScript Class and Property Decorators (ES Stage 2 Draft)	23
7. window.onerror - / - particularly mobile browser support	23
8. css/svg property dominant-baseline	22
9. Can I use Reporting API	22
10. Add WebDriver	22
11. form input property "valueAsNumber"	22
12. Add ES7/2016 SIMD	20
13. text-wrap	20
14. Add lab() and lch() from CSS Color Module Level 4	18
15. Priority hints API	18
16. CSS3 module "Generated Content for Paged Media" and especially the target-counter function	18
17. I suggest adding statistics for Aural style sheets which contain CSS properties such as "speak....	18
18. Entries for href values including `tel:1234567` and `sms:1234567`	18
19. New feature: CSS Typed Object Model (CSS Typed OM)	17
20. XSLT Support table	17
21. JavaScript: Tail Call Support information missing	17
22. Hyphenation Options	17
23. Add HTTP 103 Early Hints	16
24. WebExtensions (browser extensions)	16
25. Support Intrinsic Size Attribute	15
26. border-corner-shape	15
27. ESNI (Encrypted Server Name Indication)	15
28. Support constructible stylesheets / adoptedStyleSheets	14
29. Add CSS Grid Layout Module Level 3 (Masonry!)	14
30. Page Lifecycle API	14
31. device-cmyk css feature	14
32. Add hwb() CSS function	13
33. `content: leader('.');`	13
34. Add CSS Color Module Level 5 (color-adjust(), color-mix(), color-contrast())	13
35. Add beforeinput event	13
36. Add Media Queries Ranges	13
37. <video> `playsinline` attribute	13
38. Check browser support for displaying MJPEG files. This is a motion JPEG file format that is supporte...	13
39. SVGZ-specific support table since iOS < 4.2 doesn't support it, but does support SVG. Not su...	12
40. I suggest support for TransferableObject types (of which there are several)	12
41. text-security missing in list of features	12
42. Color Fonts including SVG-in-OT fonts	11
43. Soft hyphen: html entity &shy;	11
44. Geo URI scheme	11
45. webcl?	11
46. Async iterators / for await of	11
47. Add Report-To API (Intervention Reports)	10
48. Add CSS Nesting	10
49. Paint Timing API	10
50. CSS Box Alignment Module Level 3	10
51. Please add iFrame element contentWindow property	9
52. Quota Management API	9
53. queueMicrotask support	9
54. New feature request: OCSP must-staple	9
55. Progressive JPEGs start to show on pages faster, from low quality and eventually getting their 100% ...	9
56. CSS3 Speech Module Which browsers support it? See	9
57. + WASM SIMD	9
58. Support for SVG's "shape-rendering" CSS property.	9
59. Cookies: max-age	9
60. webM alpha transparency	8
61. Add CSS animation timing function spring()	8
62. Add float: footnote to CSS3	8
63. List support for the window.fetch keepalive option	8
64. Include `baseline-shift` CSS property	8
65. @font-face descriptors to override font metrics	8
66. ElementInternals/form-associated custom element	8
67. Add Web Share Target API	7
68. SVG viewport-fill-opacity property support	7
69. SVG viewport-fill property support	7
70. caniuse : Constructable Stylesheet	7
71. HTTP2 Server Push	7
72. Please add "isInputPending()"	7
73. WebGL extensions	7
74. Add supported elliptical curves (HTTPS/TLS)	7
75. Add Web Share Level 2	7
76. 'imagesizes' & 'imagesrcset' for <link rel="preload">	7
77. Multicolor Glyph support (COLR/CPAL)	7
78. Badging API	7
79. Support for the frame-ancestors directive	7
80. Add support for the __Host- and __Secure-	7
81. Alt-Svc header browser support info: consider adding	7
82. input[autocomplete] (values besides on/off)	7
83. Add SVG `use` with external reference	7
84. RFC7692 Compression Extensions for WebSocket	7
85. Add `multipart/x-mixed-replace`	6
86. WebTransport	6
87. Add enterkeyhint attribute ("Enter Key Hint")	6
88. Secure Cookie flag	6
89. HTML Modules	6
90. Add caniuse data for Contact Picker API	6
91. Flag storage that is not available under private mode	6
92. Fetch Metadata Request Headers	6
93. Add save-data client hint	6
94. Add 'require-sri-for' CSP Directive	6
95. Add scroll-padding	6
96. Cannot see |ImageCapture| entry in the web interface.	6
97. CSS tag {content: url()}	6
98. New feature request: x25519 Key Exchange	6
99. CSS unit 'cap' (cap-height)	6
100. HTMLVideoElement.requestVideoFrameCallback()	6
101. MediaStream Image Capture	6
102. Geofencing API	6
103. autocorrect for input fileds	6
104. Feature: Origin-bound one-time codes delivered via SMS	5
105. -ms-overflow-style	5
106. -webkit-box-orient is not found	5
107. one-time-code	5
108. Add isSecureContext feature to list	5
109. WebCrypto Key Discovery	5
110. Add WebRTC insertable streams	5
111. Add Web Share Target API Level 2	5
112. Add support tables for document.documentElement.clientWidth	5
113. Accelerated Shape Detection in Images	5
114. Module Worker support	5
115. Please track the various HTTP Set-Cookie options supported by browsers	5
116. Serial API	5
117. Adding Khronos gITF 2.0 for 3D models	5
118. audio / video autoplay attribute and play function	5
119. Track support for navigator.getInstalledRelatedApps()	5
120. Support individual CSP rules	5
121. Support CSS two-value display syntax	5
122. Embedded color profiles in JPEG images.	5
123. Add info about css user-modify and -webkit-user-modify:read-write-plaintext-only	5
124. add support for PerformanceLongTaskTiming	5
125. Add autocorrect, autocapitalize, autocomplete attributes	5
126. Observable	5
127. mediagroup content attribute, MediaController object, VideoTrackList, AudioTrackList objects	5
128. Add `text-underline-offset` property	4
129. Support the W3 Web Annotation standard (W3C Recommendation)	4
130. Add window.showOpenFilePicker	4
131. ::-webkit-file-upload-button	4
132. Feature: A Well-Known URL for Changing Passwords	4
133. Support aria-hidden html property	4
134. Bundled HTTP Exchanges	4
135. Page-margin boxes (@top-center, etc)	4
136. [CSS Level 4 pseudo-class] :user-error	4
137. CSS 3 property: text-autospace and text-spacing	4
138. TCP Fast-Open. Now that Linux kernels enable this by default (and web servers likely won't be ...	4
139. New top level domains (TLD)	4
140. CSS Shaders -	4
141. Add Cookie Store API	4
142. Add mediaSession API	4
143. Arithmetic coded JPEG support	4
144. Track Intl.Segmenter	4
145. `Cross-Origin-Embedder-Policy` HTTP header	4
146. Feature addition: navigator.mediaCapabilities.decodingInfo()	4
147. CSS Round Display	4
148. Web locks	4
149. HTTP Strict Transport Security Preload	4
150. User-Agent Client Hints (UA-CH)	4
151. For printing support for the size:landscape option to tell the browser what page orientation we want...	4
152. Payment Handler API	4
153. CSS image() functional notation (e.g. for background-images etc). See	4
154. Cache-Control	4
155. Add font-palette-values	4
156. Screen Capture	4
157. USDZ file format	4
158. Add previousSibling and previousElementSibling	4
159. Add raw sockets API	4
160. SVG sprites with <symbol> and <use>	3
161. Add support for addHitRegion	3
162. ECMAscript - static properties	3
163. Add meta "format-detection"	3
164. getTotalLength()	3
165. Add Intl.DisplayNames	3
166. Add Versatile Video Coding (VVC) … somewhen	3
167. Input Events Level 1 and 2	3
168. event.ctrlKey	3
169. display: table-caption?	3
170. Support for MHTML	3
171. Add Media Session API Coverage Information	3
172. Add Webassembly Threads / Threaded Webassembly	3
173. Support SVG width/height = auto	3
174. Grid-auto-flow	3
175. Add <data> element	3
176. Keyboard Lock	3
177. place-items shorthand for justify and align	3
178. navigator.isProtocolHandlerRegistered and .unregisterProtocolHandler	3
179. allowtransparency	3
180. The "auto" value for the dir attribute, added in HTML5 to ease inserting text of unknown d...	3
181. add window-inactive pseudo-class	3
182. Track CSS `scroll-snap-stop`	3
183. Add data for link rel="alternate"	3
184. ActiveX	3
185. Add support for requestSubmit	3
186. The !important css thing. It's very !important ;).	3
187. Add ECC certificates	3
188. New browser feature: rest/spread in object literals	3
189. new CSS trigonometry functions	3
190. Adding Silverlight usage stats	3
191. <virtual-scroller>	3
192. Public class properties	3
193. Network Service Discovery	3
194. Add information about CSS pseudo selector :defined	2
195. <semantics> element in MathML is not found in caniuse.com	2
196. Load event support on link nodes to show when a stylesheet is finished loading. See for a discussio...	2
197. CSS3 marquee support.	2
198. Add Geolocation Sensor	2
199. SVG image auto height	2
200. EventTarget Constructor	2
201. Add Integrated Windows Authentication	2
202. add "unicode property escapes"	2
203. <input type=file>: ability to modify the selected files via JS	2
204. Support KV Storage build-in module	2
205. Add new SVG filter effects	2
206. Storage Access API	2
207. Content-Security-Policy: block-all-mixed-content	2
208. getFilesAndDirectories	2
209. add Accessibility Object Model	2
210. Spatial Navigation support	2
211. Remote Playback API	2
212. for ... of support data	2
213. Feature addition: navigator.mediaCapabilities.encodingInfo()	2
214. add captureVisibleTab	2
215. add iframe.csp	2
216. add csp lv2 violation event	2
217. Support for Canvas isPointInPath()	2
218. Add PNG cursor	2
219. SSML	2
220. SVG Foreign Object is a way to combine different XML namespaces elements into the SVG.	2
221. I would like to know which browsers support the forceSpellCheck() method (	2
222. .getPointAtLength()	2
223. Why not suggests 'setPrototypeOf '	2
224. Wildcard "*" support for Access-Control-Allow-Headers/Methods	2
225. Feature suggestion: Top level `await`	2
226. getEventListeners not listed	2
227. CSS page property (for printing)	2
228. Tiff image format	2
229. UTF-8 Dingbats	2
230. Feature suggestion: add "scrollRestoration" for the History API	2
231. ::-webkit-inner-spin-button ::-webkit-outer-spin-button	2
232. Add `import.meta`	2
233. Loading Signed Exchanges	2
234. Add information for the webcal and webcals protocols for subscribing to iCalendars	2
235. http://www.w3.org/TR/web-alarms/	2
236. Private Click Measurement (PCM)	2
237. setTimeout and setInterval callback parameters	2
238. Add HTMLInputElement.select()	2
239. filename*=UTF-8''...	2
240. documentMode	2
241. Content-Security-Policy: script-nonce	2
242. Bitmap images inside SVG files. Some browsers that support SVG, will not show embedded bitmap image...	2
243. Add other values of `user-select` property	2
244. onerror event on iframe	2
245. Add browser support for toggle()	2
246. SharedMemory/Atomics	2
247. Add support for FlyWeb API	2
248. Add 'animated GIF as favicon'?	2
249. Add `q` (quarter-millimeters) length unit	2
250. Can I use X3D?	2
251. InputDeviceCapabilities API	2
252. Please add ES3 support	2
253. Device-Memory Client Hint & navigator.deviceMemory JS API	2
254. Container media queries	2
255. HTTP Trailers	2
256. Please add attachInternals	2
257. track support for the media query feature -ms-high-contrast	2
258. support destructuring assignment as separate es feature	2
259. JS Self-Profiling API	2
260. console.assert(boolean_expression)	2
261. Support of sms: and mms: in mobile browsers is not clear	2
262. Directional focus navigation: the nav-up, nav-right, nav-down, nav-left properties	2
263. [DOM API] `signal` option on EventTarget.protoype.addEventListener	2
264. String.prototype.split() with a regex with grouping ( parentheses ).	2
265. Audio codec - xHE-AAC / USAC	2
266. HTTP immutable responses	2
267. Which browsers adhere to ETag?	2
268. Add Web Budget API	2
269. Input type=email with "multiple" attribute	2
270. Support for CSS3 background-repeat-x and background-repeat-y properties	2
271. Show ANSI escape code for console.log.	2
272. Default function parameters	2
273. Graphite font support	2
274. What about showing support for various link attributes, like "subresource" or "dns-pr...	2
275. x-webkit-speech	2
276. srcset/sizes attribute / picture element support in SVG	2
277. Basic Authentication: AuthName directive	2
278. justify-content: space-around	2
279. CSS touch-action level 2 values	2
280. Add transitionstart event	2
281. `from-image` as initial value of `image-orientation`	1
282. Add Window.stop	1
283. <object>.contentWindow Support	1
284. Support Data Suggestion: Clients API	1
285. step property of input field with type datetime-local and time	1
286. Add support information for font metric override descriptors	1
287. Use of es6 import statements in workers	1
288. Web intents/Web Activities	1
289. device-pixel-content-box for ResizeObserver	1
290. OfflineAudioContext	1
291. performance.measureMemory()	1
292. iframe disallowdocumentaccess property	1
293. I suggest adding information about support for alternate HTTP methods such as PUT and PATCH.	1
294. Touch Icons, per	1
295. accesskey attribute on non-focusable elements (should cause a click element to fire	1
296. auto Picture-in-Picture	1
297. supported-color-schemes & prefers-color-scheme	1
298. Support for XPath 2.0 (interesting for a lot of new functions, like base-uri(), matches() etc.)	1
299. <meta name="apple-mobile-web-app-capable" content="yes" />	1
300. Add support for CSS clip property	1
301. CSS3 new text-transform keywords	1
302. Metadata name: MobileOptimized	1
303. No information about the `unselectable` HTML attribute.	1
304. line-height support and the differences in rendering between webkit&trident and other engines.	1
305. Support for hrefTranslate	1
306. Refresh	1
307. please add the onsearch event	1
308. DownloadURL	1
309. Metadata name: HandheldFriendly	1
310. baseline-middle	1
311. Streams API: transferable streams	1
312. Add the Javascript double asterisk power operator (**) to the list of supported features	1
313. x-webkit-airplay	1
314. Add dynamic-range media query	1
315. Textarea wrap attribute (off, soft, hard, virtual, physical)	1
316. rel="ar" support	1
317. Add Text.wholeText property	1
318. Intl.NumberFormat - notation (scientific, engineering, etc)	1
319. Add Compression Stream API	1
320. Request: IPv6 proxy functions (myIpAddressEx and friends)	1
321. Add layout-instability support	1
322. grid-row-gap and grid-column-gap	1
323. Add Support for MPEG-4 Part 2 SP/ASP	1
324. HTMLInputElement API: select support	1
325. Clean up css-touch-action	1
326. @top-left @bottom-center ? can you test for compatibility	1
327. Document Policies	1
328. Add information on context-stroke and context-fill	1
329. Add desynchronized (low latency canvas contexts)	1
330. What is the browser support for the newly proposed "page-orientation" property?	1
331. Missing feature: Clipboard API supported mimetypes	1
332. How to show support for font-variation-settings within @font-face?	1
333. dns.resolve	1
334. The event handler window.onscroll is missing	1
335. Browser support for RTP streams?	1
336. webkit-calendar-picker-indicator	1
337. Add `::target-text` (from CSS Pseudo-Elements Module Level 4)	1
338. CanIUse OpenSearch	1
339. Tracking various WebAuthn features	1
340. Adding contain-intrinsic-size (suggestion)	1
341. css animation on “content:” - works on chrome, doesn't work on Safari and Firefox	1
342. Information about WavPack audio format	1
343. CMAF	1
344. Please add JavaScript string functions trimStart, trimEnd, trimRight, trimLeft	1
345. Track adoption of DOMFrameContentLoaded event	1
346. Support for calc() in polygon and other shapes	1
347. MediaTrackConstraints	1
348. Add Sanitizer API	1
349. Add support for svg fill-rule	1
350. InsertKey Behaviour Overwrite/Normal Mode	1
351. MediaStream Recording (	1
352. browserconfig.xml support info	1
353. Add page for relative path in HTTP Location	1
354. reflected-xss missing	1
355. Support setCapture and releaseCapture for mouse	1
356. add onstorage	1
357. Feature request: Token Binding Protocol	1
358. IETF RFCs	1
359. SHA2 certificates	1
360. apple-touch-icon	1
361. Add hreflang attribute usage support for link element	1
362. event.path	1
363. Missing a check for msConvertURL() on DragEvent	1
364. Support for nested calc expressions in CSS values	1
365. Add "Named function expressions"	1
366. Open search autodiscovery	1
367. add mouse event positions event.offsetX and event.offsetY	1
368. CSS Inline Layout	1
369. Internationalized Domain Name	1
370. Add XSL to caniuse	1
371. Add support for CSS3 move-to property	1
372. Missing `StorageQuota` support	1
373. add "document.contentType"	1
374. aria-labelledby	1
375. SHA1 certificates	1
376. Add support for HTTP header X-Permitted-Cross-Domain-Policies	1
377. Add support for the HTTP header X-Download-Options	1
378. add micropub	1
379. support data suggestion: DOM event constructors ?	1
380. [Suggestion] display: fullscreen	1
381. min/max-device-width/height	1
382. Add High Resolution Time Level 3	1
383. Add: Task Scheduler API Specification	1
384. column combination	1
385. background-composite	1
386. longdesc attribute support	1
387. Drag and Drop API - ghost image with customizable opacity	1
388. Please add support for getTimezoneOffset()	1
389. Add Object.prototype.watch method	1
390. Add KeyboardEvent.repeat compatibility info	1
391. Add CSS4 Grid structural selectors	1
392. request support for 'accept-charset'	1
393. add CSS Extensions meant for renaming	1
394. show support for namespacing; for example <svg: namespace	1
395. The xml:space attribute	1
396. window.event	1
397. Add a footnote regarding HTMLAudioElement	1
398. ie behavior	1
399. Support info for the <track> element	1
400. Animating SVG paths using CSS	1
401. Drag and Drop API - move constraints	1
402. window.localMediaStream is not listed	1
403. CaretPosition missing	1
404. Audio Output Devices API: wd	1
405. DeviceOrientation and DeviceMotion events on insecure origins	1
406. Javascript - window.onorientationchange	1
407. audio / video .canPlayType(MIMEtype)	1
408. Add Range.getBoundingClientRect browser support table	1
409. Add support for mediacapture-output API's sinkID	1
410. document type	1
411. Add windows-theme media query selector	1
412. Add HTTP_ORIGIN feature	1
413. Add WebKit Tap Highlight Color (-webkit-tap-highlight-color)?	1
414. Add box-suppress	1
415. attachEvent event handler missing from CanIUse	1
416. Suggestion: Int64 UInt64 (Firefox only AFAIK)	1
417. string-set	1
418. Add css-timing	1
419. aria-current	1
420. https mixed mode	1
421. Add the "frame" HTML tag : some browsers don't support it !	1
422. [HTTP Header] Cross-Origin-Opener-Policy	1
423. Node.contains	1
424. Character-based alignment in a table column using text-align	1
425. Support for console.groupCollapsed	1
426. Add support information for SVG's getIntersectionList	1
427. user-modify	1
428. [Feature Policy: sub-feature] Sandbox features	1
429. image-resolution. I've seen this as a good alternative for retina images as opposed to backgro...	1
430. support for HTMLTableElement.createTBody	1
431. window.watchMedia()	1
432. Add compatibility for FormData	1
433. Add H2 ORIGIN frame support	1
434. Cannot find cancelBubble	1
435. Add a matrix entyre for opentype-with-cff2	1
436. Add: Tracking Preference Expression APIs	1
437. Suggested addition - document.baseURI	1
438. Please list support for event.eventPhase	1
439. Add checking for DataTransfer	1
440. add " -ms-overflow-style"	1
441. The hanging-punctuation property: Currently unsupported by any browser, but it would be nice to ...	1
442. VTTRegion is not found in caniuse	1
443. Support for Service Worker Life Cycle Events	1
444. Support for RegExp Named Capture Groups	1
445. Suggested addition: navigator.cpuClass	1
446. online/offline can also be used as events and are not covered by caniuse.com (only boolean property is covered)	1
447. Report Retry-After header support	1
448. Keyboard Map API	1
449. date.toLocaleString support tracking plz?	1
450. column-break-after atm only via: -webkit-column-break-after	1
451. Missing computed property names	1
452. Add `onpagehide` support data	1
453. add aria-required to caniuse, if not already there	1
454. Suggestion for caniuse.com: Which browsers.versions support multiple tbody elements in a single table?	1
455. CanvasRenderingContext2D.ellipse()	1
456. Input type=range with "multiple" attribute	1
457. Add app-region?	1
458. URLSearchParams.prototype.sort	1
459. SVG symbols in CSS	1
460. Support for ImageBitmapRendereingContext	1
461. Support XMLDocument	1
462. Need full 3gp browser compatibility chart.Does it chrome browser supports 3gp format	1
463. Request: nav-up, nav-down, nav-left, nav-right css3 properties	1
464. Add "Controlling Font Display Per Font-Family via @font-feature-values"	1
465. Video media in image contexts	1
466. Please add support for supported x509 extensions for ʜᴛᴛᴘꜱ certificates	1
467. create @Media Types	1
468. Add support for document.queryCommandState	1
469. Chained selectors	1
470. script tag onerror attribute	1
471. Javascript pseudoprotocol	1
472. aria-label	1
473. JS add oncuechange	1
474. [HTTP Header] Accept-CH-Lifetime	1
475. Browser support for displaying the unicode block "Combining Diacritical Marks for Symbols"	1
476. "GeometryUtils" - part of the CSSOM. Provides much better position information than existi...	1
477. Support for Unicode and spaces in URL	1
478. Add System Colors item	1
479. add for...of loops	1
480. Support data for Unicode flag on HTML pattern attribute	1
481. HTTP Content-encoding: LZFSE	1
482. IPv6 support in web browsers	1
483. Edge and IE don't support IndexedDB in web workers	1
484. Suggestion: support for margin-collapse?	1
485. add ime-mode	1