Public bug reported:
Firefox Nightlies recently became GTK3-enabled, and that uncovered an
issue with Ubuntu's Ambiance & Radiance GTK3 themes.
They're missing a "background-color" for the .tooltip {...} CSS rule in
their config files. They have a "tooltip_bg_color" variable, which they
use to set up a background-image (really a gradient), but there's no
background-color.
This causes problems for GTK3-enabled Firefox, because it reads back some
system-colors by setting up a dummy tooltip and reading the
(currently-not-useful) background-color and the foreground-color. Right now,
this produces unreadable output (for the user) with
white-text-on-a-white-background, as shown in this screenshot:
https://bug1187203.bmoattachments.org/attachment.cgi?id=8638351
The solution is simple -- just add this one line to the ".tooltip" CSS rule in
gtk-widgets.css:
background-color: @tooltip_bg_color;
For more details, see bug
https://bugzilla.mozilla.org/show_bug.cgi?id=1187203
ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: light-themes 14.04+15.04.20150410-0ubuntu1
ProcVersionSignature: Ubuntu 3.19.0-23.24-generic 3.19.8-ckt2
Uname: Linux 3.19.0-23-generic x86_64
ApportVersion: 2.17.2-0ubuntu1.1
Architecture: amd64
CurrentDesktop: GNOME
Date: Fri Jul 24 17:35:25 2015
EcryptfsInUse: Yes
InstallationDate: Installed on 2015-05-18 (67 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
PackageArchitecture: all
SourcePackage: ubuntu-themes
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: ubuntu-themes (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug vivid
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https://bugs.launchpad.net/bugs/1478173
Title:
Ambiance & Radiance themes are missing a "background-color" for
tooltip elements (needed for GTK3-enabled Firefox Nightly)
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