That's also fine if you specify your distro name and use your distro specific bug tracker to report your issues, unless you're pulling in the official distribution of upstream software through something like Flatpak that bypasses your system.

Even then I've found that many Flatpaks are broken on Ubuntu that work fine on Manjaro. Weird distro configurations really are a terrible burden on developers, this stuff makes me never want to publish software that gets absorbed into distros.

Mozilla was right to force Debian to rename their modified version of their browser. More packages should use such policies in my opinion, especially if they're complex to set up right like this piece of software.