Yea, I know all of that.<p>&gt;It&#x27;s possible to build it without those problems (see Fennec on F-Droid in fact)<p>Fennec is stuck on 40 because of difficulties with building it, and even when one person managed to build it, .apk didn&#x27;t start on others developers phone. A few people tried upgrading it to 41 and all failed, I guess fennec is kill now. I talked about it a few times on their IRC with people responsible for fennec.