I figured out that there was still an instance of chromium running in the background. After downgrading to 87.0.4280.141, fonts are working correctly. The warning message still exists, so I think it is a red herring.
So there seems to be a regression in how fonts are picked in 88.0.4324.41. ** Summary changed: - (chrome:1089093): Gtk-WARNING **: 11:50:41.068: Theme parsing error: gtk.css:1555:23: 'font-feature-settings' is not a valid property name + Font regression in chromium 88 beta -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to chromium-browser in Ubuntu. https://bugs.launchpad.net/bugs/1910789 Title: Font regression in chromium 88 beta Status in chromium-browser package in Ubuntu: New Bug description: When I run chromium, I am getting a weird font in the browser. Sometimes if you refresh the page, the weirdness might go away. If I run chromium from the command line, I see the following: (chrome:1089093): Gtk-WARNING **: 11:50:41.068: Theme parsing error: gtk.css:1555:23: 'font-feature-settings' is not a valid property name I also don't know which version I am running. I am trying to run the stable snap channel but I had the beta channel installed. `chromium --version` gives: Chromium 87.0.4280.141 snap but the about dialog box shows: Version 88.0.4324.41 (Official Build) snap (64-bit) As you can see in the screenshot, the font issue affects the developer tools as well, so it is not just a problem with a specific web page. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/chromium-browser/+bug/1910789/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

