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