Is this with all websites/pages, some, a few?

Many site issues can be caused by corrupt cookies or cache.

Warning ! ! This will log you out of sites you're logged in to. You may also lose any settings for that website.

• Delete cookies to remove the information websites have stored on your computer {web link}

• How to clear the Firefox cache {web link}

If there is still a problem, Start Firefox in Safe Mode {web link} by holding down the <Shift> (Mac=Options) key, and then starting Firefox.

A small dialog should appear. Click Start In Safe Mode (not Refresh). Did this help?

While you are in safe mode;

Try disabling graphics hardware acceleration in Firefox. Since this feature was added to Firefox it has gradually improved but there are still a few glitches.

How to disable Hardware Acceleration {web link}

So far, I noticed this problem in figma.com and canva.com.

I cleaned all the cookies and cached data and still had the problem. Then, when I restarted Firefox in Safe Mode and tried to use Figma, I got this error: "We can't open this file because WebGL isn't supported, or is disabled, in your browser. If your browser supports WebGL, check out this help article to find out how to enable it."

I also tried disabling hardware acceleration, but that didn't worked either.

Weird thing is that it was working fine a few days ago.

Btw, I'm using Linux (Ubuntu). I don't if that has anything to do with the problem.

Fixed it.

I apparently I had changed some settings in about:config that was causing the problem. I reset everything and now it's working fine.

Thanks for the help! :)

That was very good work. Well Done.