[Solved] Mozilla applications (FF/Thunderbird) start slow under Wayland

15 June 2025, 22:09:03

Hi,
I have Hyprland installed on my Artix linux.
Everything works well (after configuring A LOT

)but there is one thing that annoys me.
Firefox and Thunderbird take a good 10 sec before their window appears.
I do not have this with other GTK apps (ex. Geany etc.) : they launch almost instantly.
There used to be a DBus timeout error for gtk apps in wayland but that is more like 25 sec. And again I only have it with Firefox and Thunderbird and not with other gtk applications.
Worth nothing is that when I click on an URL link in my terminal (kitty) the tab opens in Firefox but again after a very noticeable delay ...
So I think this might be IPC related but I'm not at all familiar with the subject neither on how to monitor it (I also tried dbus-monitor but the messages that are produced are not very helpful and difficult to understand).
Any Idea on how to further debug this or even how to solve it ?
For what it's worth : I also briefly installed the COSMIC environment (also wayland based) and had the same problem there. So it is not hyprland related in my opinion.

Thanks for any help

Re: Mozilla applications (FF/Thunderbird) start slow under Wayland

Reply #1 – 16 June 2025, 22:55:27

I realized both firefox and thunderbird use internet while my other gtk apps (almost) do not.
So I started to look to my internet connection.
When I installed Artix (recently) I used connman as network manager.
So I tested what would happen if I replaced connman by networkmanager ...
And for some strange reason all the startup problems of FF/ thunderbird were gone !
Almost instant startup, before FF could take up up to 120 seconds (according to the summary report of strace) !
Marking this as solved.