Download tar.gz, unzip and run binary and recheck. in Firefox then first thing before deeping into it should be retesting it on upstream release. We can improve it performance, or launch time etc. We can ship customization like force app to match theme, style etc. Then we write fix and offer it and sometimes we see: 'hey good job thanks' or 'nah, works fine on Ubuntu, and Arch is not my target and thats why we don't want merge it, please fix it on your own'. go to POP download and click Configuration instructions For IMAP, scroll to IMAP access. We can fix platform specific bug - because upstream not always is interested in fixing it (many times upstream doing this - it works on Deb/Ubuntu so not my problem). Any type of email account can be set up in Mozilla Thunderbird. We can apply patches that fixing annoying issues before upstream. Choose the Extensions tab, click the gear icon and choose Install Add-on From File Choose XPI file, install and restart. XUL applications rely on the Mozilla codebase or a fork of it. From the Thunderbird Menu Bar, select Tools then Add-ons to open the Add-ons Manager. XUL (/ z u l / ZOOL), which stands for XML User Interface Language, is a user interface markup language developed by Mozilla.XUL is an XML dialect for writing graphical user interfaces, enabling developers to write user interface elements in a manner similar to web pages. We can ship package with security fixes before upstream. Download and install GitHub XPI version via the Add-ons Manager.

rpm/.deb/etc It's not like 'hey dude, stop package XYZ app because upstream provide installer for it and it is better and you broke community and wasting effort'.

we often fixing and cleaning mess when package application into.

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