1707564 - Title bar becomes very large when a tab has bold text in it's title

Status: RESOLVED DUPLICATE of bug 1704404

(Core :: Widget: Gtk, defect)

Description

[Oschowa]

Attachment: enlarged_titlebar.png

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:89.0) Gecko/20100101 Firefox/89.0

Steps to reproduce:

• Firefox 89 dev edition (downloaded from mozilla.org)
• Arch Linux
• Gnome 40, X11, Adwaita (default) dark theme

Since Firefox 89 and the proton UI redesign, a single tab with bold text in it's title causes the title bar to become excessively large. Opening this site reproduces it for me: https://old.reddit.com/r/anime/comments/myri6a/so_this_is_what_%F0%9D%90%92%F0%9D%90%AD%F0%9D%90%AE%F0%9D%90%9D%F0%9D%90%A2%F0%9D%90%A8_%F0%9D%90%96%F0%9D%90%A2%F0%9D%90%AD_has_been_up_to_vivy/

I'll attach a screenshot of the enlarged title bar to show the issue.

Actual results:

Title bar became excessively large after opening the mentioned link in a new tab.

Expected results:

Title bar size should not change.

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Core::Widget: Gtk' component, and is moving the bug to that component. Please revert this change in case you think the bot is wrong.

Comment 2

[Francesco Lodolo [:flod]]

Note: it's not simply bold (which wouldn't work in a title), it's unicode characters.