We published a statement on our stance on neutrality of free software (and why we won't stay neutral in this case): https://f-droid.org/en/2019/07/16/statement.html
You seem to believe that Gab is wholly composed of harassers. This is simply false.
The majority of Gab users are nothing like that. AND harassers exist on every platform.
Singling out Gab like this is silly.
The reason Gab has been seized upon is because it's popular with Trump supporters, and a lot of Trump opponents are desperate to do anything they can to prevent Trump 2020.
Firefox doesn't brand itself with the logo of a company that abuses free speech to promote and benefit off hate speech. This is exactly what Gab does and - at least for me - which is the elephant in the room that hardly anyone talks about. Free speech, free speech, but why is Gab so proud of performing and/or tolerating gestures that actively harm other people?
Freespeech is a mastodon instance hosted on Fire Dragon Studios, everyone should have the right to speak their mind without fear of being silenced. Hosted in the grand ol' US of A