Alternatives and similar repositories for addons:

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

• mozilla / addons-linter
  🔍 Firefox Add-ons linter, written in JavaScript. 👁
  ☆328Updated this week
• mozilla-extensions / webcompat-addon
  Hotfixing the web, one Intervention at a time.
  ☆61Updated this week
• mozilla / sign-addon
  Sign a Firefox add-on with Mozilla's web service
  ☆71Updated last year
• mozilla / fxa-content-server-l10n
  translated strings for Firefox accounts website
  ☆23Updated this week
• mozilla / extension-workshop
  Firefox Extension Workshop
  ☆110Updated this week
• mozilla-l10n / www.mozilla.org
  Localization of www.mozilla.org
  ☆64Updated 4 years ago
• mozilla / nightlytt
  Nightly Tester Tools
  ☆61Updated 2 years ago
• wisniewskit / google-search-fixer
  ☆106Updated 9 months ago
• duckduckgo / duckduckgo-locales
  Translation files for duckduckgo.com
  ☆98Updated last week
• mozilla-l10n / sumo-l10n
  Strings for support.mozilla.org
  ☆10Updated this week
• mozilla / taar
  Telemetry-Aware Addon Recommender
  ☆30Updated last year
• browserext / browserext
  ☆95Updated 2 years ago
• mozilla / activity-stream
  A refreshed "new tab page" for Firefox
  ☆183Updated 5 years ago
• browserext / browserext.github.io
  ☆21Updated last year
• mozilla / data-review
  Templates for Firefox data collection review process (https://wiki.mozilla.org/Firefox/Data_Collection)
  ☆37Updated 2 years ago
• mozilla-lockwise / lockwise-addon
  Take your passwords everywhere
  ☆263Updated 2 years ago
• meh / smart-referer
  MOVED to GitLab: https://gitlab.com/smart-referer/smart-referer/
  ☆95Updated 6 years ago
• piroor / multipletab
  Multiple Tab Handler, Provides feature to close multiple tabs.
  ☆84Updated last week
• mozilla / mozregression
  Regression range finder for Mozilla nightly builds
  ☆173Updated 2 weeks ago
• duckduckgo / smarter-encryption
  ☆147Updated 4 years ago
• webcompat / webcompat.com
  Source code for webcompat.com
  ☆378Updated last year
• 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
• ahal / mozconfigwrapper
  Like virtualenvwrapper except for mozconfigs
  ☆26Updated last year
• Rob--W / https-by-default
  Use HTTPS by default for navigations from the location bar in Chrome / Firefox.
  ☆66Updated 2 years ago
• mozilla / lightbeam-we
  Web Extension version of the Firefox Lightbeam add-on
  ☆188Updated last year
• mozilla-bteam / bmo
  bugzilla.mozilla.org source - report issues here: https://bugzilla.mozilla.org/enter_bug.cgi?product=bugzilla.mozilla.org
  ☆154Updated this week
• schomery / policy-control
  A browser extension to allow first-party resources with exceptions!
  ☆31Updated 6 years ago
• mozilla / notes
  DEPRECATED - A notepad for Firefox
  ☆500Updated 4 years ago
• mozilla-lockwise / lockbox-extension
  Experimental Firefox extension for login management experiences, not being actively developed
  ☆128Updated 6 years ago
• mozilla / amo-validator
  Validator for addons.mozilla.org
  ☆62Updated 6 years ago