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