Created attachment 1355561 [details] Screenshot of my desktop when running on my external monitor. Description of problem: I recently upgraded to Fedora 27 and now Firefox and Thunderbird have unreasonably large buttons and text fields (the entire UI appears "too large" compared to other Gnome apps). I observe this problem when working on my laptop with an external monitor attached. Both my laptop and my external monitor have resolution 2560x1440 (one is 13" the other is 27"). When working on my laptops display every thing looks normal; I only encounter this HiDPI problem when working on my external monitor. I'm attaching a screenshot of my desktop with firefox running. Observe the difference in font sizes (etc) between firefox and nautilus (and the gnome-shell). Version-Release number of selected component (if applicable): How reproducible: Every day Steps to Reproduce: 1. Plugin external monitor 2. Start firefox 3. Actual results: Firefox is huge Expected results: I would have expected fonts and other chrome to not be twice the size as for Gnome apps. Additional info: In Firefox, I have not set layout.css.devPixelsPerPx to another value than the default (-1)
see also bug 1523944
This issue seems to be fixed for Firefox on Wayland. So now Firefox for Wayland is working (apart from a few pending bugs), I have finally set the scaling on my HiDPI display to 150%. However, this makes Thunderbird nearly useless, as it somehow seems to detect itself that it is on HiDPI and therefore also seems to apply scaling up at application level. So in the end Thunderbird looks way too big on my screen. I think a quick solution could be adding an configuration option in Thunderbird to disable its scaling. I recommend setting the component for this bug from gnome-shell to Thunderbird.
See also: https://bugzilla.mozilla.org/show_bug.cgi?id=1500698
I have just upgraded to Fedora 29, and the bug is still present for both Firefox and Thunderbird (not just Thunderbird as reported by Jan Vlug). I have updated the "Version" to "29".
Hi Søren, did you try firefox-wayland? There the problem is solved. See also bug 1054334. You have to install the package firefox-wayland to test it. The issue with Thunderbird is still there. Thunderbird is barely usable for me, especially the calendar in Lightning. Would it be a good idea to change the component from gnome-shell to thunderbird?
Hi Jan, Thanks! Indeed the issue goes away with firefox-wayland and thunderbird-wayland. Given that these are the future, we can close the bug from my perspective (the solution is en route). Thanks Søren
Hi Søren, Wow, I did not know that there is also a thunderbird-wayland. This is great! Thanks!
This message is a reminder that Fedora 29 is nearing its end of life. Fedora will stop maintaining and issuing updates for Fedora 29 on 2019-11-26. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At that time this bug will be closed as EOL if it remains open with a Fedora 'version' of '29'. Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, simply change the 'version' to a later Fedora version. Thank you for reporting this issue and we are sorry that we were not able to fix it before Fedora 29 is end of life. If you would still like to see this bug fixed and are able to reproduce it against a later version of Fedora, you are encouraged change the 'version' to a later Fedora version prior this bug is closed as described in the policy above. Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete.
Fedora 29 changed to end-of-life (EOL) status on 2019-11-26. Fedora 29 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed.