I could’ve sworn that the browser was also called just Mozilla at one point, or was that just always the suite it was part of?

You asked what GitLab offered and I answered that question. I ran GitLab at work for years. Amazing project. Much value there.

GitLab is open source and you can self-host it.

I’m getting these issues on Windows as well, to be fair.

I had no issues when I ran it. Besides, it’s marked Playable by Valve (for all that’s worth), and ProtonDB seems to agree.

Maybe they fixed it?

You don’t need Proton-GE for Fallout 76, even.