1755661 - Firefox in KDE Plasma as default application

Status: RESOLVED WORKSFORME

(Firefox :: Shell Integration, defect)

Description

[Juan Simón]

Operating System: Arch Linux
KDE Plasma Version: 5.24.0
KDE Frameworks Version: 5.91.0
Qt Version: 5.15.2
Graphics Platform: X11

Click make default in Firefox settings.
Select Firefox in KDE Plasma settings → Applications → Default applications.

$ xdg-settings get default-web-browser
firefox.desktop

But Firefox still does not detect that it is the default browser.

Comment 1

[:Gijs (he/him)]

Moving to shell integration because the implementation of IsDefaultBrowser and SetDefaultBrowser lives there, not in the preferences code.

Comment 2

[Negritas Sergiu, Desktop QA]

Hello! I have tried to reproduce the issue with Ubuntu 20.04 with firefox 101.0a1 (2022-04-07) and 99.0 and I have managed to set the browser as default web browser.
Adding the QA-not-reproducible tag since we can't reproduce this issue on our end.

Comment 3

[Juan Simón]

@Negritas What version of Plasma have you tested with?

I tested it today and it still crashes on Arch Linux.

KDE Plasma Version: 5.24.4
KDE Frameworks Version: 5.92.0
Qt Version: 5.15.3
Kernel Version: 5.17.1-zen1-1-zen (64-bit)
Firefox 99

How does Firefox check whether or not it is the default browser?

Comment 4

[:Gijs (he/him)]

(In reply to Juan Simón from comment #3)

@Negritas What version of Plasma have you tested with?

I tested it today and it still crashes on Arch Linux.

Sorry, does the browser cash completely? This wasn't mentioned in comment 0... Does this happen with the non-distribution build (ie an official build from mozilla.org) ? If so, can you link to a crash report from about:crashes ?

Comment 5

[Juan Simón]

I'm sorry I got the verb wrong, I didn't mean to say that it crashes but that it still fails.

Comment 6

[Negritas Sergiu, Desktop QA]

Hello Juan! Sorry for the long response time. Here is the Plasma details of my system. I will try again after I will update the Plasma and KDE versions.
plasmashell 5.18.8
Qt: 5.12.8
KDE Frameworks: 5.68.0
kf5-config: 1.0

Comment 7

[Kostadin]

Also reproducible on Gentoo

When I try to set it as a default browser in firefox' settings journalctl --follow says the following:

авг 19 21:06:34 gentoo plasmashell[280943]: [Parent 280943, Main Thread] WARNING: g_find_program_in_path: assertion 'program != NULL' failed: 'glib warning', file /var/tmp/portage/www-client/firefox-103.0.2/work/firefox-103.0.2/toolkit/xre/nsSigHandlers.cpp:167``` авг 19 21:06:34 gentoo firefox[280943]: g_find_program_in_path: assertion 'program != NULL' failed

Comment 8

[Kostadin]

Refreshing firefox fixes this.

Comment 9

[Negritas Sergiu, Desktop QA]

Hello Kostadin!

Since your last comment I will mark this issue as RESOLVED-WORKSFORME, if this issue occurs again please feel free to reopen it.

Have a nice day