Alternatives and similar repositories for addons:

Users that are interested in addons are comparing it to the libraries listed below

• mozilla-extensions / webcompat-addon
  Hotfixing the web, one Intervention at a time.
  ☆62Updated this week
• mozilla / addons-linter
  🔍 Firefox Add-ons linter, written in JavaScript. 👁
  ☆328Updated this week
• mozilla / mozregression
  Regression range finder for Mozilla nightly builds
  ☆173Updated last month
• wisniewskit / google-search-fixer
  ☆105Updated 8 months ago
• mozilla / nightlytt
  Nightly Tester Tools
  ☆61Updated last year
• mozilla / fx-private-relay-add-on
  Companion add-on for Firefox Relay. Keep your email safe from hackers and trackers. Make an email alias with one click, and keep your add…
  ☆71Updated 3 months ago
• mozilla / sign-addon
  Sign a Firefox add-on with Mozilla's web service
  ☆72Updated last year
• mozilla / extension-workshop
  Firefox Extension Workshop
  ☆106Updated this week
• Rob--W / https-by-default
  Use HTTPS by default for navigations from the location bar in Chrome / Firefox.
  ☆64Updated 2 years ago
• mozilla-bteam / bmo
  bugzilla.mozilla.org source - report issues here: https://bugzilla.mozilla.org/enter_bug.cgi?product=bugzilla.mozilla.org
  ☆154Updated this week
• webcompat / webcompat.com
  Source code for webcompat.com
  ☆373Updated last year
• mozilla-l10n / sumo-l10n
  Strings for support.mozilla.org
  ☆10Updated this week
• mozilla / activity-stream
  A refreshed "new tab page" for Firefox
  ☆183Updated 4 years ago
• hiikezoe / web-ext-webpack-plugin
  A webpack plugin for web-ext
  ☆79Updated last week
• mozilla / universal-search
  Completed Test Pilot experiment: add-on that inserts server recommendations into the Awesome Bar
  ☆29Updated 8 years ago
• mozilla-extensions / aboutsync
  A Firefox addon to show information about Sync.
  ☆80Updated 5 months ago
• mozilla / testpilot
  Test Pilot is a platform for performing controlled tests of new product concepts in Firefox
  ☆251Updated 2 years ago
• mozilla / fxa-content-server-l10n
  translated strings for Firefox accounts website
  ☆23Updated this week
• mozilla-l10n / www.mozilla.org
  Localization of www.mozilla.org
  ☆64Updated 4 years ago
• meh / smart-referer
  MOVED to GitLab: https://gitlab.com/smart-referer/smart-referer/
  ☆95Updated 6 years ago
• EFForg / badger-sett
  Automated training for Privacy Badger. Badger Sett automates browsers to visit websites to produce fresh Privacy Badger tracker data.
  ☆122Updated this week
• mozilla / side-view
  An experiment with opening mobile views of pages in the sidebar
  ☆199Updated 4 months ago
• mozilla / blok
  Web Extension implementation of Firefox tracking protection for experimental development
  ☆25Updated last year
• mozilla-frontend-infra / codetribute
  A site that guides contributors to their first contribution
  ☆55Updated 2 weeks ago
• operasoftware / chrome-webstore-extension
  Contains the code of the Download Chrome Extension hosted at https://addons.opera.com which allows users to install extensions from Googl…
  ☆103Updated 4 years ago
• browserext / browserext
  ☆95Updated 2 years ago
• Lusito / web-ext-translator
  An easy to use translation tool for web-extensions
  ☆47Updated 8 months ago
• NiklasGollenstede / wikipedia-peek
  Firefox add-on / chrome/opera extension that shows previews of linked articles on Wikipedia pages
  ☆19Updated 5 years ago
• ahal / mozconfigwrapper
  Like virtualenvwrapper except for mozconfigs
  ☆26Updated last year
• mozilla-iam / dino-park-front-end
  Front-end for Mozillians.org
  ☆38Updated 3 weeks ago