I have a FireFox issue on my new M2

[CTHarrryH]

I use Firefox most of the time for browsing. On my new M2 some web sites don't end up using the entire screen - they fill top to bottom but not left to right. Didn't happen on my old Air and doesn't happen with Safari. I can use zoom but..
See example.

 

[yitwail]

I use Firefox most of the time for browsing. On my new M2 some web sites don't end up using the entire screen - they fill top to bottom but not left to right. Didn't happen on my old Air and doesn't happen with Safari. I can use zoom but..
See example.

cnn.com is like that on every browser in my M1 Air. So I doubt that's an issue. Try using private/incognito windows in other browsers, and optionally do a hard refresh, and see if the same thing happens.

 

[CTHarrryH]

Doesn't happen with Safari or didn't on my previous Air.
Happens with MacRumors also and other sites.

 

[yitwail]

Macrumors in Microsoft Edge does not go edge to edge when I maximize the window, but if there's anyone who can get that to happen, then I suppose my Air is even more defective than yours. I seldom maximize windows because I prefer to have them overlapping so it's no big deal to me. The only time I maximize is streaming video, and it's always worked for disney+, etc, and still does.

 

[pshufd]

File a bug at https://bugzilla.mozilla.org/home

It's possible that there's a hardcoded table for full-screen somewhere and it's just picking it up from the 2020 MacBook Air.