* Thanks for the Weblate contributions from: Kazushi Hayama, Retrial, nautilusx, Juraj Motuz, gallegonovato, Alexthegib, markov, Priit Jõerüüt, 109247019824, Eryk Michalak, Giovanni Donisi and Oğuz Ersen
* fix Firefox Nightly
* reduce the network usage of FFUpdater by improving the network cache
* try to configure Proguard correctly (software to compress the download and installation size of FFUpdater)
* fix the "File was not downloaded" error
* fix resource leaks
* improve logging and error reporting
* update dependencies
* refactor and clean up code
* fix unit tests