Comment 0 for bug 1883742

The 3 screenshots are all of the same conversation in my gmail inbox. One screenshot was taken running Firefox Nightly on a Focal Ubuntu install, where the font rendering seems fine. The other two screenshots were taken running Firefox Nightly on a Focal Kubuntu install.

Even on Kubuntu, the font spacing on my gmail inbox looks right on Chromium (Version 83.0.4103.61 Official Build snap 64-bit), but is funky (extra spaces within words) on Firefox Nightly, thus this was first reported as http://github.com/webcompat/web-bugs/issues/53474

In Firefox Nightly on Kubuntu or Lubuntu, the font placement/spacing often shifts around, sometimes spuriously, and sometimes when interacting, for example when i tick or untick the conversation as in the the 2nd and 3rd screenshots. Note how all the "t"'s move over in "Opportunities", "Youth", "item", and "interest".

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: kubuntu-desktop (not installed)
ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
Uname: Linux 5.4.0-21-generic x86_64
ApportVersion: 2.20.11-0ubuntu21
Architecture: amd64
Date: Tue Jun 16 10:33:36 2020
InstallationDate: Installed on 2020-04-05 (71 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200331)
ProcEnviron:
 LC_TIME=en_DK.utf8
 TERM=screen
 PATH=(custom, no user)
 LANG=en_US.utf8
 SHELL=/bin/bash
SourcePackage: kubuntu-meta
UpgradeStatus: No upgrade log present (probably fresh install)