The latest version of Firefox available for download is v50.0 but on Play Store v52.0 is available.. Why F-droid doesn't show latest version?
Firefox (Browse the web) - https://f-droid.org/app/org.mozilla.firefox
https://f-droid.org/wiki/page/org.mozilla.firefox
F-Droid doesn't include Firefox anymore (*) but some builds from Firefox code, such as Fennec and Icecat.
(*) It is due some privacy concerns, Tracking, UpstreamNonFree and Non-free Addons
At the moment
Icecat 52.4.1
Fennec 56.0
Version code: 560020,560010,560000
Current scheme: XYZAR, where X.Y.Z is upstream version, A is architecture (0 = ARMv7, 1 = x86, 2 = ARMv8), R is revision (if we need to re-release)
Q & A