Beside this, Firefox is not really welcomed (and a drop is planned eventually) on F-Droid because it&#x27;s really complex to build, depends on some closed source libraries (Google Play Services, for example) and has lots of tracking in it (everything is at least opt-out as far as I can tell, but the guys behind F-Droid aren&#x27;t really keen on any kind of tracking it seems).<p>It&#x27;s possible to build it without those problems (see Fennec on F-Droid in fact), but it takes a lot of time for someone to create a recipe, and it&#x27;s prone to break on every upgrade (and that&#x27;s why the last version of Fennec on F-Droid is based on Firefox 40).<p>I don&#x27;t know if&#x2F;how many of those problems apply on Firefox OS (I guess at least the complex build environment applies), but that&#x27;s likely why you&#x27;ll not find it on F-Droid anytime soon. Unless someone decides to pour lots and lots of energy into this.<p>More info&#x2F;sources:<p><a href="https:&#x2F;&#x2F;f-droid.org&#x2F;wiki&#x2F;page&#x2F;org.mozilla.firefox" rel="nofollow">https:&#x2F;&#x2F;f-droid.org&#x2F;wiki&#x2F;page&#x2F;org.mozilla.firefox</a><p><a href="https:&#x2F;&#x2F;f-droid.org&#x2F;wiki&#x2F;page&#x2F;org.mozilla.fennec_fdroid" rel="nofollow">https:&#x2F;&#x2F;f-droid.org&#x2F;wiki&#x2F;page&#x2F;org.mozilla.fennec_fdroid</a><p><a href="https:&#x2F;&#x2F;gitlab.com&#x2F;fdroid&#x2F;fdroiddata&#x2F;blob&#x2F;master&#x2F;metadata&#x2F;org.mozilla.fennec_fdroid.txt" rel="nofollow">https:&#x2F;&#x2F;gitlab.com&#x2F;fdroid&#x2F;fdroiddata&#x2F;blob&#x2F;master&#x2F;metadata&#x2F;or...</a>