I use Firefox 139.0.4~build1 on Debian 12, I also have a 34" screen.
When I load a map with "!m Odense" the map is terribly ugly and doesn't load in my entire window. I would attribute the stripes to "Extract canvas data permissions", but I convirmed it's allowed. I think the street layout is also a bit stretched because of the wrong screen resizing but I'm not 100% positive. Here's the bug in all its glory.
Resizing the window to half-screen makes the street angles more realistic. Zooming in makes the ugly stripes go away, but won't fix everything. Just for clarity: zooming in works on stripes, resizing the window works on street angles. These are two independent workarounds. Resizing the window to smaller and fullsize again doesn't make maps populate the right half of the screen, so I can never use maps on full screen.
I'm happy to provide additional details to debug this, if needed or connect on some IRC or whatever.
I expect the stripes to not be there, the pins to be readable always and be able to use the maps on the entire screen.
