Suggestion	Votes
1. Add HTTP 103 Early Hints	58
2. css/svg property dominant-baseline	43
3. Suggestion: MediaRecorder.isTypeSupported supported types/codecs	41
4. Add support for DNS RRs, like HTTPS and SVCB	40
5. TLS ECH (Encrypted Client Hello), formerly known as ESNI (Encrypted Server Name Indication)	39
6. + WASM SIMD	35
7. Entries for href values including `tel:1234567` and `sms:1234567`	33
8. WebExtensions (browser extensions)	31
9. Hyphenation Options	28
10. CSS3 module "Generated Content for Paged Media" and especially the target-counter function	27
11. Add WebDriver	27
12. Can I use Reporting API	25
13. border-corner-shape	24
14. Native HTML Switches	24
15. Show Support for JSON Modules	24
16. [Request] Please add Web Assembly Garbage Collection (WasmGC)	24
17. External import maps	23
18. JavaScript: Tail Call Support information missing	23
19. Priority hints API	23
20. Add CSS property `caret-shape` and shorthand `caret`	22
21. XSLT Support table	22
22. I suggest adding statistics for Aural style sheets which contain CSS properties such as "speak....	21
23. New feature: CSS Typed Object Model (CSS Typed OM)	21
24. Add CSS Grid Layout Module Level 3 (Masonry!)	21
25. Add ES7/2016 SIMD	21
26. device-cmyk css feature	19
27. Add CSS `field-sizing` (previously `form-sizing`)	19
28. Add ShadowRealm API	19
29. Geo URI scheme	19
30. Page Lifecycle API	18
31. Support constructible stylesheets / adoptedStyleSheets	18
32. `content: leader('.');`	17
33. Add tracking for Explicit Resource Management (`using` and `await using`)	17
34. Check browser support for displaying MJPEG files. This is a motion JPEG file format that is supporte...	16
35. Add Webassembly Threads / Threaded Webassembly	16
36. ElementInternals/form-associated custom element	15
37. Support Intrinsic Size Attribute	15
38. Add the Quite OK Image Format (QOI) …maybe eventually	14
39. input-security	14
40. Async iterators / for await of	14
41. New feature request: OCSP must-staple	14
42. CSS 3 property: text-autospace and text-spacing	14
43. Add Web Share Target API	13
44. I suggest support for TransferableObject types (of which there are several)	13
45. Color Fonts including SVG-in-OT fonts	13
46. WebP & AVIF favicons	13
47. Add the Popover API (ex: Pop Up API aka. the `popup` attribute plus more)	13
48. Support for SVG's "shape-rendering" CSS property.	12
49. Add float: footnote to CSS3	12
50. Add: Webassembly Garbage Collection	12
51. Page-margin boxes (@top-center, etc)	12
52. CSS Box Alignment Module Level 3	12
53. Add caniuse data for Contact Picker API	11
54. CSS3 Speech Module Which browsers support it? See	11
55. Add the `<search>` element	11
56. Add "HDR AVIF" image support	11
57. Add supported elliptical curves (HTTPS/TLS)	11
58. Add "outline follows border-radius"	11
59. Tiff image format	11
60. Add `WebOTP` to list of apis	11
61. Add WebRTC insertable streams	11
62. webcl?	10
63. Add Report-To API (Intervention Reports)	10
64. Support CSS two-value display syntax	10
65. HTTP2 Server Push	10
66. @font-face descriptors to override font metrics	10
67. Progressive JPEGs start to show on pages faster, from low quality and eventually getting their 100% ...	10
68. Include `baseline-shift` CSS property	10
69. caniuse : Constructable Stylesheet	10
70. one-time-code	10
71. Track Intl.Segmenter	10
72. queueMicrotask support	10
73. Add Web Share Level 2	10
74. Badging API	10
75. SVG viewport-fill property support	10
76. Add CSS Custom Highlight API	10
77. List support for the window.fetch keepalive option	9
78. SVG viewport-fill-opacity property support	9
79. Add the HTML focusgroup attribute	9
80. Add CSS animation timing function spring()	9
81. Add SVG `use` with external reference	9
82. -ms-overflow-style	9
83. Cookies: max-age	9
84. Quota Management API	9
85. Add support for @starting-style rule	8
86. Add CSS property -- `object-view-box`	8
87. Add text-wrap: pretty	8
88. Add support for Private State Tokens	8
89. User-Agent Client Hints (UA-CH)	8
90. Add Versatile Video Coding (VVC) … somewhen	8
91. WebGL extensions	8
92. input[autocomplete] (values besides on/off)	8
93. Add Invoker Commands, `command` & `commandfor` (previously: Invokers, `invoketarget` & `invokeaction`)	7
94. Add `multipart/x-mixed-replace`	7
95. Audio codec - xHE-AAC / USAC	7
96. New feature request: x25519 Key Exchange	7
97. Alt-Svc header browser support info: consider adding	7
98. This regards adding support for the navigator.userAgentData	7
99. Add support for iterator helpers	7
100. HTML Modules	7
101. Add Web Neural Network (WebNN)	7
102. RFC7692 Compression Extensions for WebSocket	7
103. Please add "isInputPending()"	7
104. Add `WebSocketStream` API	7
105. Add Fetch upload streaming	7
106. autocorrect for input fileds	7
107. Add 'require-sri-for' CSP Directive	7
108. Feature: Origin-bound one-time codes delivered via SMS	7
109. Add Incremental Font Transfer	7
110. Support for the frame-ancestors directive	7
111. Secure Cookie flag	7
112. new CSS trigonometry functions	6
113. Add "page based counters"	6
114. Accelerated Shape Detection in Images	6
115. Add CSS Values and Units Module Level 4 Mathematical Expressions	6
116. Add System Colors item	6
117. WebCrypto Key Discovery	6
118. Add the `:modal` pseudo-class	6
119. Window Placement API	6
120. Module Worker support	6
121. MediaStream Image Capture	6
122. USDZ file format	6
123. Playback of videos with alpha channel	6
124. add Accessibility Object Model	6
125. Embedded color profiles in JPEG images.	6
126. Observable	6
127. Add `enterkeyhint` attribute ("Enter Key Hint")	6
128. Add tracking for "Ultra HDR JPG"	6
129. Add Web Share Target API Level 2	6
130. Add "CICP in images"	6
131. Flag storage that is not available under private mode	6
132. Geofencing API	6
133. Support for MHTML	6
134. CanIUse OpenSearch	6
135. Support 'name' attribute on <details> ("Accordion pattern using name attribute on <details> elements")	6
136. Add HTTP method: QUERY	6
137. Cannot see |ImageCapture| entry in the web interface.	6
138. CSS tag {content: url()}	6
139. JS Self-Profiling API	6
140. Add ECC certificates	6
141. Add Memory64 browser feature	5
142. Add support tables for document.documentElement.clientWidth	5
143. Add IPFS (Interplanetary File System) protocol to Caniuse	5
144. Tracking various WebAuthn features	5
145. Add Declarative Web Push	5
146. Input type=email with "multiple" attribute	5
147. webp2 support	5
148. add window-inactive pseudo-class	5
149. audio / video autoplay attribute and play function	5
150. navigator.isProtocolHandlerRegistered and .unregisterProtocolHandler	5
151. Add gRPC support	5
152. Input Events Level 1 and 2	5
153. Feature: A Well-Known URL for Changing Passwords	5
154. Add font-palette-values	5
155. CSS Round Display	5
156. Add info about css user-modify and -webkit-user-modify:read-write-plaintext-only	5
157. Adding Khronos gITF 2.0 for 3D models	5
158. Graphite font support	5
159. Track the status of the JavaScript Promise Integration specification	5
160. webkit-calendar-picker-indicator	5
161. Add Local Font Access API	5
162. Bundled HTTP Exchanges	5
163. Can I Use m4a?	5
164. Support Experimental "ES Pipe Operator (|>)"	5
165. TCP Fast-Open. Now that Linux kernels enable this by default (and web servers likely won't be ...	5
166. CSS Shaders -	5
167. roundRect	5
168. HTTP Strict Transport Security Preload	5
169. Global Privacy Control (GPC) "Sec-GPC" HTTP header	5
170. Payment Handler API	5
171. New top level domains (TLD)	5
172. Add Intl.DurationFormat	5
173. Add raw sockets API	5
174. Please track the various HTTP Set-Cookie options supported by browsers	5
175. Support individual CSP rules	5
176. Add the `<model>` element	5
177. Add supports() queries on @import	5
178. viewport meta tag	5
179. Add server-timing as a trailer	4
180. Web locks	4
181. Support aria-hidden html property	4
182. Add Cookie Store API	4
183. Support for Digital Goods API	4
184. File Handling API	4
185. Accessibility of in-browser PDF Viewer	4
186. Cache-Control	4
187. Add meta "format-detection"	4
188. Add Intl.DisplayNames	4
189. SameParty cookie attribute	4
190. filename*=UTF-8''...	4
191. Support SVG width/height = auto	4
192. Support information for horizontal-viewport-segments and vertical-viewport-segments	4
193. X25519Kyber768 Hybrid Post-Quantum Key Exchange for HTTPS	4
194. Support the W3 Web Annotation standard (W3C Recommendation)	4
195. Support for Geometry Property (SVG 2.0) `r` in CSS	4
196. SVG sprites with <symbol> and <use>	4
197. documentMode	4
198. For printing support for the size:landscape option to tell the browser what page orientation we want...	4
199. Let's add a page for box alignment	4
200. [CSS Level 4 pseudo-class] :user-error	4
201. CSS image() functional notation (e.g. for background-images etc). See	4
202. Snap Events: scrollsnapchange and scrollsnapchanging	4
203. Arithmetic coded JPEG support	4
204. The !important css thing. It's very !important ;).	4
205. Safe Assignment Operator	4
206. add @mixin and @function	4
207. Add Media Session API Coverage Information	4
208. ::-webkit-file-upload-button	4
209. Add support for passwordrules input attribute	4
210. Scroll State container queries	4
211. Support new global attribute: writingsuggestions	3
212. Add support for addHitRegion	3
213. Public class properties	3
214. justify-content: space-around	3
215. add iframe.csp	3
216. Add "Responsive Video" aka. `media` attribute for `<source>` element in `<video>`	3
217. Missing feature: Clipboard API supported mimetypes	3
218. CSS multicol data is mixed with fragmentation	3
219. ECMAScript 2024 (ES15) summary page and feature support list	3
220. Add CSS Gap Decorations	3
221. Private Click Measurement (PCM)	3
222. Show ANSI escape code for console.log.	3
223. Content-Security-Policy: script-nonce	3
224. Add support for requestSubmit	3
225. New browser feature: rest/spread in object literals	3
226. Add HTMLPermissionElement	3
227. Add 'animated GIF as favicon'?	3
228. ECMAscript - static properties	3
229. dns.resolve	3
230. No information about the `unselectable` HTML attribute.	3
231. Add `dynamic-range` media query	3
232. Add support for HTTP header X-Permitted-Cross-Domain-Policies	3
233. Add CMYK Color Space	3
234. place-items shorthand for justify and align	3
235. add captureVisibleTab	3
236. Add information for the webcal and webcals protocols for subscribing to iCalendars	3
237. IPv6 support in web browsers	3
238. getEventListeners not listed	3
239. Video media in image contexts	3
240. CSS view-timeline supports	3
241. Support for CSS3 background-repeat-x and background-repeat-y properties	3
242. Add "Window Controls Overlay"	3
243. Add Wide Color Gamut in 2D Canvas	3
244. The "auto" value for the dir attribute, added in HTML5 to ease inserting text of unknown d...	3
245. video codecs	3
246. display: table-caption?	3
247. Web bundles	3
248. UTF-8 Dingbats	2
249. What about showing support for various link attributes, like "subresource" or "dns-pr...	2
250. Add `letter-spacing` support for percentage values	2
251. stroke-linejoin support	2
252. track support for the media query feature -ms-high-contrast	2
253. Request: nav-up, nav-down, nav-left, nav-right css3 properties	2
254. CMAF	2
255. Add pdf parameters support	2
256. Track adoption of DOMFrameContentLoaded event	2
257. text-space-collapse	2
258. Add "Scheduled Task API"	2
259. Support for IAMF file format	2
260. Add WebCGM	2
261. A new page for Grid track animation should be added	2
262. Information about WavPack audio format	2
263. add RTSP and RTSP 2.0 (Real Time Streaming Protocol)	2
264. Add chrome.webrequests	2
265. Please add more detailed WebRTC features	2
266. Add VisualViewport.segments support data	2
267. Add inner-spin-button and outer-spin-button	2
268. Add `::target-text` (from CSS Pseudo-Elements Module Level 4)	2
269. Tooltip display on focus	2
270. Show which browsers have a native CSV viewer	2
271. Support for hrefTranslate	2
272. WebXR Hand Input Module - Level 1	2
273. Touch Icons (apple-touch-icon)	2
274. Load event support on link nodes to show when a stylesheet is finished loading. See for a discussio...	2
275. add secure payment confirmation (W3C)	2
276. Add Container Units aka. Container Relative Lengths	2
277. Add browser support for toggle()	2
278. CSS word-break: 'auto-phrase' and 'manual'	2
279. Add block-step-size property for CSS	2
280. Bitmap images inside SVG files. Some browsers that support SVG, will not show embedded bitmap image...	2
281. Add Date.prototype.toTemporalInstant()	2
282. Add Change Array by Copy methods	2
283. Metadata name: MobileOptimized	2
284. Metadata name: HandheldFriendly	2
285. DNS-over-HTTPS (DoH)	2
286. Add TPG image file format	2
287. `from-image` as initial value of `image-orientation`	2
288. support destructuring assignment as separate es feature	2
289. image-resolution. I've seen this as a good alternative for retina images as opposed to backgro...	2
290. Drag and Drop API - ghost image with customizable opacity	2
291. Add auto-expand `<details>` for find-in-page and fragment navigations	2
292. "GeometryUtils" - part of the CSSOM. Provides much better position information than existi...	2
293. Track `<input type="color" alpha>` support	2
294. rel="ar" support	2
295. CSS touch-action level 2 values	2
296. Support KV Storage build-in module	2
297. string-set	2
298. onerror event on iframe	2
299. Can I use X3D?	2
300. Storage Access API	2
301. SharedMemory/Atomics	2
302. Device-Memory Client Hint & navigator.deviceMemory JS API	2
303. add "unicode property escapes"	2
304. x-webkit-speech	2
305. Directional focus navigation: the nav-up, nav-right, nav-down, nav-left properties	2
306. Spatial Navigation support	2
307. SSML	2
308. Loading Signed Exchanges	2
309. Add PNG cursor	2
310. srcset/sizes attribute / picture element support in SVG	2
311. add csp lv2 violation event	2
312. String.prototype.split() with a regex with grouping ( parentheses ).	2
313. SVG image auto height	2
314. Basic Authentication: AuthName directive	2
315. Add CSS4 Grid structural selectors	2
316. Add app-region?	2
317. Need full 3gp browser compatibility chart.Does it chrome browser supports 3gp format	2
318. getFilesAndDirectories	2
319. SVG symbols in CSS	2
320. HTTP immutable responses	2
321. Add HTTP_ORIGIN feature	2
322. setTimeout and setInterval callback parameters	2
323. <semantics> element in MathML is not found in caniuse.com	2
324. Input type=range with "multiple" attribute	2
325. Add Geolocation Sensor	2
326. Support of sms: and mms: in mobile browsers is not clear	2
327. console.assert(boolean_expression)	2
328. Wildcard "*" support for Access-Control-Allow-Headers/Methods	2
329. Add Integrated Windows Authentication	2
330. Animating SVG paths using CSS	2
331. HTTP Trailers	2
332. Add information on context-stroke and context-fill	2
333. Add the Javascript double asterisk power operator (**) to the list of supported features	2
334. Add selection.getComposedRange() feature check	1
335. Add `@font-feature-values`	1
336. Add `new Intl.DateTimeFormat().resolvedOptions().hour12`	1
337. Web monetization	1
338. CSS value random()	1
339. Add tracking for ASTC hdr profile	1
340. Add variable units	1
341. aria-labelledby	1
342. Missing `StorageQuota` support	1
343. Textarea wrap attribute (off, soft, hard, virtual, physical)	1
344. Opus: Need data for MP4 and WebM containers	1
345. SHA1 certificates	1
346. Add support for CSS3 move-to property	1
347. Add `<mapviewer>` (inline MapML)	1
348. Add "Scoped Custom Element Registry" as it is now behind an experimental feature flag in Chrome	1
349. Add XSL to caniuse	1
350. reflected-xss missing	1
351. Add `PWA file handlers`	1
352. Content-Security-Policy: navigate-to	1
353. Suggestion: @font-face src OpenType collection support	1
354. DeviceOrientation and DeviceMotion events on insecure origins	1
355. Support info for the <track> element	1
356. Add High Resolution Time Level 3	1
357. Feature request: Matroska (MKV) video container	1
358. Audio Output Devices API: wd	1
359. WebSerial	1
360. add aria-required to caniuse, if not already there	1
361. aria-current	1
362. Please add support data for "CSS property: clip-path: inset()". Thank you!	1
363. Add css-timing	1
364. Add Gradient Interpolation Color Spaces	1
365. [Suggestion] display: fullscreen	1
366. SVG 2: inline-size property for text	1
367. Add WebDriver BiDi	1
368. CAA DNS record	1
369. import.sync()	1
370. request support for 'accept-charset'	1
371. add micropub	1
372. Add inherited value references	1
373. Add support for the HTTP header X-Download-Options	1
374. Add URL.canParse()	1
375. Add Inference capabilities from browser.trial.ml	1
376. CSS generated images: Stripes	1
377. Adding Managed Media Source	1
378. Add box-suppress	1
379. Add CSS `@property`	1
380. Add Isolated Web Apps (IWAs)	1
381. Support for VSR (Video Super Resolution) on Nvidia and Intel GPUs	1
382. Add `@supports at-rule`	1
383. Add support for CRL	1
384. Add `:local-link` pseudo selector	1
385. Add standalone MathML files in MML format	1
386. Add Device Posture API (formerly Screen Fold API)	1
387. Request support data for bevelled="true" attribute in MathML	1
388. `border-color: currentColor;`	1
389. Add `::search-text` (& `::search-text:current`)	1
390. Add WICG/compression-dictionary-transport	1
391. udp: add feature	1
392. Add caret-animation	1
393. Add Structured Error Data for Filtered DNS	1
394. Suggestion | Safe Operator: ?=	1
395. Add a footnote regarding HTMLAudioElement	1
396. CSS Values 3 `src()` function	1
397. document type	1
398. WebAuthN: "prf" extension support	1
399. webauthn: Related Origin Requests (ROR)	1
400. Feature request: tc39 Explicit Resource Management	1
401. Internationalized Domain Name	1
402. permessage-deflate	1
403. 32-bit HDR PNG	1
404. Support of webkitAudioDecodedByteCount	1
405. Add `clipboardchange` event	1
406. add mouse event positions event.offsetX and event.offsetY	1
407. Open search autodiscovery	1
408. 'font-size' descriptor for '@font-face'	1
409. Audio format: AC-3, eac3	1
410. X.509 Name Constraints	1
411. Add "Named function expressions"	1
412. viewport-fit	1
413. Browser support for Running elements	1
414. Please add TLS certificate algorithms to caniuse	1
415. column combination	1
416. mediacapture-region	1
417. event.path	1
418. SHA2 certificates	1
419. add CSS Extensions meant for renaming	1
420. Add Web Translation API …maybe eventually	1
421. Support for CSS Color Module Level 5	1
422. CSS property media-controls-panel	1
423. Add Web Preferences API …maybe eventually	1
424. Add RFC 8879 TLS Certificate Compression	1
425. Add Range.getBoundingClientRect browser support table	1
426. prefers-reduced-transparency CSS Media Query	1
427. Add "Controlling Font Display Per Font-Family via @font-feature-values"	1
428. URLSearchParams.prototype.sort	1
429. DownloadURL	1
430. step property of input field with type datetime-local and time	1
431. CSS3 new text-transform keywords	1
432. bidi algorithm (for right-to-left Unicode characters)	1
433. FLoC support	1
434. Use of es6 import statements in workers	1
435. Add `::-webkit-details-marker`	1
436. Add: "color" and "background-color" CSS on <option> elements	1
437. Add URL Protocol Handler Registration for PWAs	1
438. Feature request: Token Binding Protocol	1
439. requestPostAnimationFrame browser support?	1
440. Suggestion for caniuse.com: Which browsers.versions support multiple tbody elements in a single table?	1
441. E4X: ECMAScript for XML	1
442. supported-color-schemes & prefers-color-scheme	1
443. Add `media` attribute for `<meta>` element (for `<meta name="theme-color">`)	1
444. Add "specifying a color profile: the `@color-profile` at-rule"	1
445. missing HTTP TRACE method	1
446. Add entry for DTLS 1.3	1
447. add onstorage	1
448. script tag onerror attribute	1
449. Can you please add the Stack trace API that exists in V8	1
450. OfflineAudioContext	1
451. stroke-linecap support	1
452. Add page for relative path in HTTP Location	1
453. http mixed mode	1
454. please add the onsearch event	1
455. Add support information for font metric override descriptors	1
456. nested calc() and var()	1
457. CSS Inline Layout	1
458. What is the browser support for the newly proposed "page-orientation" property?	1
459. Add layout-instability support	1
460. InsertKey Behaviour Overwrite/Normal Mode	1
461. Add Support for MPEG-4 Part 2 SP/ASP	1
462. longdesc attribute support	1
463. Add support for svg fill-rule	1
464. Add desynchronized (low latency canvas contexts)	1
465. css animation on “content:” - works on chrome, doesn't work on Safari and Firefox	1
466. Adding contain-intrinsic-size (suggestion)	1
467. Clean up css-touch-action	1
468. Request: IPv6 proxy functions (myIpAddressEx and friends)	1
469. Streams API: transferable streams	1
470. <object>.contentWindow Support	1
471. iframe disallowdocumentaccess property	1
472. performance.measureMemory()	1
473. Support for calc() in polygon and other shapes	1
474. Please add JavaScript string functions trimStart, trimEnd, trimRight, trimLeft	1
475. create @Media Types	1
476. baseline-middle	1
477. auto Picture-in-Picture	1
478. The event handler window.onscroll is missing	1
479. How to show support for font-variation-settings within @font-face?	1
480. Refresh	1
481. IETF RFCs	1
482. Add WebKit Tap Highlight Color (-webkit-tap-highlight-color)?	1
483. date.toLocaleString support tracking plz?	1
484. Add tech() function support (in @font-face src)	1
485. Add `font-variant-emoji`	1
486. Add `Notification.prototype?.showTrigger?`	1
487. Add CSS Toggles …maybe eventually	1
488. Add Object.prototype.watch method	1
489. sec-ch-prefers headers	1
490. Sec-Ch-wow64	1
491. accesskey attribute on non-focusable elements (should cause a click element to fire	1
492. Add Capture Handle	1
493. <meta name="apple-mobile-web-app-capable" content="yes" />	1
494. Javascript pseudoprotocol	1
495. Chained selectors	1
496. browserconfig.xml support info	1
497. Add `target="_new"`	1
498. Support HTJ2K	1
499. Add CSS Scroll Snap Module Level 2	1
500. Add "method of opting into following the visual order", currently `focus-order` …maybe eventually	1
501. Add Background Blur API	1
502. Please add support for supported x509 extensions for ????? certificates	1
503. Add Web MIDI 2.0 …maybe eventually	1
504. x-webkit-airplay	1
505. Support for XPath 2.0 (interesting for a lot of new functions, like base-uri(), matches() etc.)	1
506. import reflection for WASM	1
507. Add `blocking=render`	1
508. Add IndexedDB 3.0	1
509. Add Payment Request API 1.1	1
510. Add optional type syntax for JavaScript …maybe eventually	1
511. Browser support for displaying the unicode block "Combining Diacritical Marks for Symbols"	1
512. Add windows-theme media query selector	1
513. Add compatibility for FormData	1
514. Report Retry-After header support	1
515. feature request: video/MP2T	1
516. online/offline can also be used as events and are not covered by caniuse.com (only boolean property is covered)	1
517. Suggested addition: navigator.cpuClass	1
518. Support for Service Worker Life Cycle Events	1
519. Add MathML Core	1
520. Add compatibility data for QuickTime video format	1
521. Add a matrix entyre for opentype-with-cff2	1
522. Add Notification Triggers	1
523. window.localMediaStream is not listed	1
524. Add H2 ORIGIN frame support	1
525. window.watchMedia()	1
526. Support for Unicode and spaces in URL	1
527. [Feature Policy: sub-feature] Sandbox features	1
528. The xml:space attribute	1
529. Character-based alignment in a table column using text-align	1
530. Missing computed property names	1
531. Add: Tracking Preference Expression APIs	1
532. Suggestion: support for margin-collapse?	1
533. show support for namespacing; for example <svg: namespace	1
534. HTTP Content-encoding: LZFSE	1
535. MediaStream Recording (	1
536. MPNG	1
537. Support data for Unicode flag on HTML pattern attribute	1
538. Drag and Drop API - move constraints	1