1420259 - Support fractional scaling on Linux

Status: RESOLVED DUPLICATE of bug 1767142

(Core :: Widget: Gtk, enhancement, P3)

Description

[Parrenin]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:57.0) Gecko/20100101 Firefox/57.0
Build ID: 20171112125346

Steps to reproduce:

Gnome 3.26 now supports (experimentally) fractional scaling (tested with ubuntu 17.10).
For gtk applications, the fonts are scaled and look clear.
But for firefox (57), the fonts look blurry.


Actual results:

The fonts in FF looks blurry with fractional scaling.


Expected results:

The fonts should scale up as well and look clear, as for gtk applications.

Comment 1

[stevesmiles222]

Fractional scaling was pulled from Gnome for awhile. However, Gnome 3.32 officially supports fractional scaling again in Wayland sessions after issuing the following command:
gsettings set org.gnome.mutter experimental-features "['scale-monitor-framebuffer']"
Ubuntu 19.04 and Fedora 30 are both shipping in under 2 months with Gnome 3.32 officially, and Fedora even more so defaults to Wayland with Ubuntu supporting it through the login menu. Given that Firefox ships as the default browser in both of these mainstream distributions and looks broken by default once the above command is issued, it would be nice to assign this bug to someone.

Comment 2

[Jan Vlug]

See also bug 1466616.

Comment 3

[Clémence Lesné]

See also bug 1554526.

It's usable on a 32 inches monitor (but tiring for eyes), but on a 13 inches it's barely usable.

This report is open for more than 2 years now, and scaling is shipped by default on Gnome. Please, could it be possible to fix this?

Comment 5

[Jan Vlug]

Note that on Fedora there is a firefox-wayland package available. This package has still several issues (mainly in the area of pop-ups and consequently adding bookmarks), but it has also many benefits.
When I use firefox-wayland on a hidpi screen with 150% scaling, the fonts are way to small, so I always have to zoom in nearly every web page.

Comment 6

[Martin Stránský [:stransky] (ni? me)]

I don't have adequate hardware to test in on X11. For Wayland there's a Bug 1543035 and it should be more or less working on Firefox Wayland backend.

Comment 8

[Clémence Lesné]

Anyone on this issue? I confirm that this UI behavior is really, really annoying and frustrating...

Comment 9

[Martin Stránský [:stransky] (ni? me)]

(In reply to Clément Lesné from comment #8)

Anyone on this issue? I confirm that this UI behavior is really, really annoying and frustrating...

No, the only supported way is to use Firefox Wayland backend.

Comment 10

[Taegil Bae]

Enabling the experimental feature "scale-monitor-framebuffer", I have set fractional scale 125% for my 12.5" screen of resolution 1920x1080. This is working well. But Firefox is resized to a specific size on every startup, ignoring the previous window size. In addition, pull-down menus are small to fit the specific window size. Firefox seems to calculate the screen size incorrectly, so think that the previous window size is too large to fit that screen size. I have tested Firefox-Nightly 99.0a1 (2022-02-11), Firefox 97.0, Firefox Developer Edition 98.0b3 on Gnome 41.3, Arch Linux.

Comment 11

[Taegil Bae]

Attachment: firefox shrinks its window to a specific size on startup. menu is also small.

Comment 12

[Robert Mader [:rmader]]

This is tracked in bug 1707209 now.

Comment 13

[Robert Mader [:rmader]]

Err, I mean bug 1767142 of course.