Maybe they can finally make Google Sheets, etc... off-line stand alone app.
Thanks Google.
PS: I think it's basically ancient wisdom at this point to keep a Chrome instance around to best handle most Google properties, but I don't remember seeing it much spelled out in official documentation.
Lots of office suites exist, but Microsoft has to tread lightly. In Recent News, the EU is dinging them for bundling/tying Teams with Office. Because it's a dominant market position, regardless of competitors.
If at some future time, Google Sheets has a significant market share, they might get dinged, too.
We're talking about 4 or 5 browsers, putting serious effort into supporting them all would be reasonable.
Building a Firefox extension would be the right move.