Comment by moho

The author got banned from github and gitlab after DMCA takedowns. The code used to be available in those, but I guess he got tired of starting over?

Anyway, extensions are just signed zip files. You can extract them and view the source. BPC sources are not compressed or obfuscated. The extension is evaluated and signed by Mozilla (otherwise it wouldn't install in release-channel Firefox), if you put any stock in that.