w3c/webextensions

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Charter and administrivia for the WebExtensions Community Group (WECG)

Stars: 711
Forks: 95
Open beginner issues: 0
Indexed issues: 468
Avg merge: 10d 11h
Merged PRs (30d): 2

Dominant language: Bikeshed
License: No license data
Last GitHub push: Sep 17, 2026
Latest indexed: Sep 20, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed

Beginner friendly Everything

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468 open issues indexed

TPAC 2026 breakout session proposal Open

admin task topic: ai tpac 2026

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/webextensions#1094 · 1 comment · 1 reaction · Opened Sep 17, 2026
Inconsistency: sub-menu context inheritance Open

implemented: firefox implemented: safari needs-triage: chrome topic: menus

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/webextensions#1090 · 1 comment · Opened Sep 15, 2026
Proposal: alias `menus` and `contextMenus` permissions Open

needs-triage: chrome needs-triage: firefox needs-triage: safari proposal topic: menus topic: permissions

Difficulty 5/5 Over a week Newbie friendliness 45/100

w3c/webextensions#1089 · 2 comments · Opened Sep 15, 2026
Inconsistency: `browser.menus` and `browser.contextMenus` aliasing Open

implemented: safari needs-triage: chrome needs-triage: firefox topic: menus

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/webextensions#1088 · 1 comment · Opened Sep 15, 2026
Inconsistency: unlimitedStorage permission in optional_permissions manifest key Open

inconsistency needs-triage: chrome needs-triage: firefox needs-triage: safari topic: permissions topic: storage

Difficulty 4/5 3-5 days Newbie friendliness 48/100

w3c/webextensions#1087 · 1 reaction · Opened Sep 14, 2026
Inconsistency: menus vs contextMenus Open

needs-triage: chrome needs-triage: firefox needs-triage: safari topic: menus

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/webextensions#1086 · 1 reaction · Opened Sep 13, 2026
maxResults and engine limits Open

needs-triage: chrome needs-triage: firefox needs-triage: safari

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/webextensions#1084 · 1 reaction · Opened Sep 11, 2026
Agenda discussion for public meeting on 2026-10-24 Open

agenda

w3c/webextensions#1083 · 1 comment · 1 reaction · 1 assignee · Opened Sep 10, 2026
Proposal: runtime.getContexts() should populate tabId for tab-specific side panel Open

needs-triage: firefox needs-triage: safari

Difficulty 4/5 3-5 days Newbie friendliness 48/100

w3c/webextensions#1081 · 1 comment · Opened Sep 10, 2026
Improve browser<->extension contract for displaying extension UI Open

needs-triage: chrome needs-triage: firefox needs-triage: safari topic: action topic: sidebar

Difficulty 5/5 Over a week Newbie friendliness 30/100

w3c/webextensions#1080 · 4 comments · Opened Sep 10, 2026
Agenda for Working Group meeting on 2026-09-17 Open

agenda wewg

Difficulty 1/5 Under an hour Newbie friendliness 35/100

w3c/webextensions#1078 · Opened Sep 6, 2026
Proposal: add `runtime.MessageSender.windowId` property Open

proposal supportive: chrome supportive: firefox supportive: safari topic: tabs and windows

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/webextensions#1077 · 2 comments · Opened Sep 5, 2026
`runtime.getContexts()`: populate windowId for contexts with type `POPUP` and `SIDE_PANEL` Open

implemented: firefox inconsistency neutral: safari supportive: chrome

Difficulty 4/5 3-5 days Newbie friendliness 48/100

w3c/webextensions#1076 · 1 comment · Opened Sep 5, 2026
Proposal: limit length of extension action title Open

needs-triage: chrome needs-triage: firefox needs-triage: safari

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/webextensions#1075 · 7 comments · Opened Sep 5, 2026
WebExtensions at TPAC 2026 Open

tpac 2026

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/webextensions#1072 · 1 comment · 1 reaction · Opened Sep 3, 2026
Cross-browser TypeScript types for WebExtensions (webext-meta-types) Open

needs-triage: chrome needs-triage: firefox needs-triage: safari

Difficulty 5/5 Over a week Newbie friendliness 30/100

w3c/webextensions#1071 · 4 comments · 3 reactions · Opened Sep 2, 2026
Proposal: add `embeddedEnabled` in `browser.mimeHandler` options Open

needs-triage: chrome needs-triage: firefox needs-triage: safari

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/webextensions#1070 · 7 comments · Opened Sep 2, 2026
Proposal: require secure URLs in `runtime.setUninstallURL` Open

needs-triage: chrome neutral: firefox neutral: safari

Difficulty 5/5 Over a week Newbie friendliness 38/100

w3c/webextensions#1066 · 8 comments · Opened Aug 21, 2026
Specify behavior of `browser` global using accurate WebIDL Open

wewg

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/webextensions#1065 · Opened Aug 21, 2026
Proposal: opt-in for literal context menu title (in menus.create) Open

needs-triage: safari

Difficulty 5/5 Over a week Newbie friendliness 45/100

w3c/webextensions#1064 · 4 comments · 1 reaction · Opened Aug 21, 2026
Inconsistency: proxy.settings Open

needs-triage: chrome needs-triage: firefox needs-triage: safari

Difficulty 4/5 3-5 days Newbie friendliness 42/100

w3c/webextensions#1058 · Opened Aug 6, 2026
Inconsistency: runtime.getPlatformInfo() Open

inconsistency needs-triage: chrome needs-triage: safari supportive: firefox

Difficulty 5/5 Over a week Newbie friendliness 30/100

w3c/webextensions#1056 · 4 comments · 1 reaction · Opened Aug 4, 2026
Inconsistency: Return value for alarms.clearAll() Open

implemented: firefox inconsistency supportive: chrome supportive: safari topic: alarms

Difficulty 4/5 3-5 days Newbie friendliness 48/100

w3c/webextensions#1055 · 11 comments · Opened Aug 1, 2026
Allow extensions to inject content scripts into sandboxed extension pages Open

enhancement needs-triage: chrome needs-triage: safari proposal supportive: firefox topic: scripting

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/webextensions#1054 · 10 comments · 1 reaction · Opened Jul 31, 2026
Amendments to Proposal: browser.test API Open

supportive: chrome supportive: firefox supportive: safari topic: testing

Difficulty 4/5 3-5 days Newbie friendliness 45/100

w3c/webextensions#1051 · 3 comments · Opened Jul 24, 2026
Formal review of W3C documents Open

discussion task

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/webextensions#1046 · 1 reaction · Opened Jul 16, 2026
Add ability to determine if a tab is a new tab page Open

needs-triage: chrome neutral: firefox supportive: safari topic: tabs and windows

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/webextensions#1042 · 6 comments · 2 reactions · Opened Jul 8, 2026
Browser-mediated permission lifecycle for AI agents acting on a user's behalf Open

needs-triage: chrome needs-triage: firefox needs-triage: safari topic: ai

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/webextensions#1041 · Opened Jul 6, 2026
Review and Feedback requested: Attribution Level 1 2026-06-29 > 2026-07-29 Open

wewg

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/webextensions#1040 · 9 comments · Opened Jul 6, 2026
Proposal: cross-browser support for cross-origin isolation on extension pages (COOP/COEP manifest keys) Open

implemented: chrome supportive: firefox supportive: safari

Difficulty 5/5 Over a week Newbie friendliness 30/100

w3c/webextensions#1039 · 1 reaction · Opened Jul 4, 2026
Browser-hosted OAuth client metadata for WebExtensions Open

needs-triage: chrome needs-triage: firefox needs-triage: safari

Difficulty 5/5 Over a week Newbie friendliness 30/100

w3c/webextensions#1038 · 3 comments · Opened Jul 4, 2026
The userScripts API should provide a method/option to register overwriting an existing id without us explicitly checking first whether it exists or not Open

needs-triage: chrome needs-triage: firefox needs-triage: safari

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/webextensions#1036 · 8 comments · Opened Jul 1, 2026
Inconsistency: valid characters in extension resource URLs Open

needs-triage: chrome needs-triage: firefox needs-triage: safari

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/webextensions#1035 · 1 comment · 1 reaction · Opened Jun 28, 2026
W3C request to transfer the "webextensions" repo to @w3c-cg Open

admin

Difficulty 4/5 3-5 days Newbie friendliness 25/100

w3c/webextensions#1034 · 6 comments · Opened Jun 26, 2026
#798 vs #883: How should we empower extensions to add new permissions without overly alarming their current user base? Open

discussion follow-up: chrome needs-triage: chrome needs-triage: firefox needs-triage: safari topic: permissions

Difficulty 5/5 Over a week Newbie friendliness 30/100

w3c/webextensions#1032 · 8 comments · 1 reaction · Opened Jun 22, 2026
Proposal: Limits on how much data can be set or retrieved at once for extensions with unlimited storage Open

needs-triage: chrome needs-triage: firefox needs-triage: safari topic: storage

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/webextensions#1028 · 3 comments · Opened Jun 18, 2026
`extension.inIncognitoContext` inconsistencies Open

implemented: firefox inconsistency needs-triage: chrome needs-triage: safari spec clarification topic: private browsing

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/webextensions#1026 · Opened Jun 12, 2026
Request: Provide attach/detach event without debugger permission Open

needs-triage: chrome needs-triage: firefox needs-triage: safari

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/webextensions#1025 · 2 comments · 2 reactions · Opened Jun 12, 2026
Scoped CustomElementRegistry fails with "Illegal constructor" in isolated content scripts Open

needs-triage: chrome needs-triage: firefox needs-triage: safari topic: custom elements topic: scripting

Difficulty 5/5 Over a week Newbie friendliness 30/100

w3c/webextensions#1024 · 1 comment · 1 reaction · Opened Jun 11, 2026
Service Worker / Event Page lifetime management during ongoing network requests (`fetch` / `XHR`) Open

needs-triage: chrome needs-triage: firefox needs-triage: safari topic: background scripting

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/webextensions#1016 · 2 comments · Opened May 30, 2026
`action.setBadgeXXXX` lacks context isolation between normal and Incognito/private windows Open

needs-triage: chrome needs-triage: firefox needs-triage: safari topic: action

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/webextensions#1015 · 4 comments · 1 reaction · Opened May 30, 2026
AI inference in MV3 service workers: timeout interruption, no error signal, and the accessibility use case Open

needs-triage: chrome needs-triage: firefox needs-triage: safari topic: background scripting

Difficulty 5/5 Over a week Newbie friendliness 25/100

w3c/webextensions#1014 · 2 comments · Opened May 28, 2026
Proposal: runtime.getVersionName() method Open

neutral: chrome neutral: firefox neutral: safari

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/webextensions#1011 · 10 comments · Opened May 26, 2026
Implement browser.menus.onShown Open

implemented: firefox needs-triage: chrome supportive: safari topic: menus

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/webextensions#1010 · 6 comments · 2 reactions · Opened May 25, 2026
When a webpage creates a same-origin document (iframe/popup/tab) the content scripts at document_start must run before the main world sees the document Open

needs-triage: chrome needs-triage: firefox needs-triage: safari topic: scripting

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/webextensions#1009 · 7 comments · 3 reactions · Opened May 25, 2026
Meta: `w3c.github.io/webextensions` is a 404 Open

admin

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

w3c/webextensions#1007 · 2 comments · 1 reaction · Opened May 23, 2026
Specify meaning of `homepage_url` and `developer.url` manifest keys Open

needs-triage: chrome needs-triage: firefox needs-triage: safari spec clarification

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/webextensions#1006 · Opened May 23, 2026
Deprecate `author` in favor of `developer.name` Open

follow-up: chrome follow-up: firefox neutral: safari next manifest version supportive: firefox

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/webextensions#1005 · 2 comments · Opened May 23, 2026
Inconsistency: Execution order for DNR modifyHeaders and `webRequest.onBeforeSendHeaders` Open

follow-up: chrome inconsistency needs-triage: chrome needs-triage: firefox needs-triage: safari topic: dnr topic: webRequest

Difficulty 4/5 3-5 days Newbie friendliness 42/100

w3c/webextensions#1004 · 10 comments · Opened May 21, 2026
Proposal: "name" attribute in second argument of alarms.create() Open

implemented: chrome implemented: safari supportive: firefox topic: alarms

Difficulty 5/5 Over a week Newbie friendliness 35/100

w3c/webextensions#999 · 8 comments · 2 reactions · Opened May 19, 2026

w3c/webextensions

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