Solved Terminal Garbled/Unusable - Win10 Firefox (latest)

[robi]

When I open a terminal it looks like this:

It's not my dark background and light text extension for sure, as I disabled it and it still happens.
Not sure what else could be causing this.
uBlock Origin is disabled on this domain.

[mehdi]

Not happening for me, on MacOS, with Firefox latest.

Is it happening only for this one app, or for all of them ?

[robi]

@mehdi
It's on all of the apps. I have to switch to another browser to see what I'm doing.

I can type out commands just fine but output is all garbled.

The file manager also doesn't display contents of files when clicked on. blank screen. Probably related.

[nebulon]

These might be two different issues I think. The filemanager uses the monaco text editor, while the terminal is using xtermjs.

For the terminal, this could be a regression since the last update to the latest xtermjs version. Anyways would be good if you could triage this first to see which OS/browser combination is affected. At least I cannot reproduce this here for a proper bug report upstream.

Issues would be at https://github.com/xtermjs/xterm.js/issues

Since you mention Firefox on Win10, they enabled webrender there, so one test could be to go into about:config and set gfx.webrender.all to false, then restart the browser and check the terminal again.

[robi]

Since you mention Firefox on Win10, they enabled webrender there, so one test could be to go into about:config and set gfx.webrender.all to false, then restart the browser and check the terminal again.

This is already set to false.

[girish]

So, is it garbled on all browsers or just Firefox latest? What does latest mean (doesn't about:config show some version?)

[robi]

Since I had just updated FF to 81.0 it's the latest.

Now there looks to be 81.0.1 and will try it out.

[marcusquinn]

Quite happy with FF Nightly and the new WebRender Experimental setting, seems to be faster. Dunno if it helps here but might help to see if it's fixed in up-coming versions or not.

[A Former User]

@robi
I had the exact same Firefox problem, but solved it by allowing my.example.com the "extract canvas data" permission.

[robi]

@hillside502 where is that set? didn't see it in about:config or about:preferences

[A Former User]

@robi One of the icons just to the left of the address bar.

[robi]

it seems that after an update, this setting is now set, so no more issue.

The icon looks like a circle+line over a line+circle.

o--
--o

[A Former User]

@robi That's the icon!