* [[Modules/Calendar|Calendar]]
* [[Modules/FirefoxOS|FirefoxOS]]
* [[Modules/Toolkit|Toolkit]]
* [[Modules/Core|Core]]
* [[Modules/MailNews_Core|MailNews Core]]
* [[Modules/Chat|Chat]]
* [[Modules/Bugzilla|Bugzilla]] - the Bugzilla software itself
* [[Modules/bugzilla.mozilla.org|bugzilla.mozilla.org]] - the particular Bugzilla installation run by the Mozilla project
* [[Modules/Other|Other]] (code modules which aren't in any of the above categories)
* [[Modules/Activities|Activities]] (non-code)