1880107 - hr elements appear as dots rather than lines in about:addons preferences

Status: RESOLVED INVALID

(WebExtensions :: General, defect)

Description

[Jeff Johnson]

Attachment: Sample add-on to demonstrate the bug

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.3 Safari/605.1.15

Steps to reproduce:

1. Load the attached sample add-on "hrbug"
2. Open about:addons
3. Select hrbug Preferences

Actual results:

The <hr> elements appear as dots.

Expected results:

The <hr> elements appear as lines.

Comment 1

[Jeff Johnson]

Attachment: Screenshot demonstrating the bug

Comment 2

[BugBot [:suhaib / :marco]]

The Bugbug bot thinks this bug should belong to the 'Toolkit::Add-ons Manager' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 3

[Mark Striemer [:mstriemer]]

Appears to be caused by the body of the prefs browser being flex-column. https://searchfox.org/mozilla-central/rev/4fe00e0322377316390da6faa2d645cae53d08f4/browser/components/extensions/extension.css#26-27

Removing that rule fixes the <hr>s but then the content doesn't take the available height. Seems like that could potentially move to the stack containing the <browser> though

Comment 4

[Alex Cornestean]

Hello,

I reproduced the issue on the latest Nightly (124.0a1/20240214213412), Beta (123.0/20240213221259) and Release (122.0.1/20240205133611) under Windows 10 x64 and macOS 11.3.1.

The issue occurs as described in Comment 0 and the attached screenshot.

Comment 5

[Rob Wu [:robwu]]

Add "browser_style": false to your options_ui to fix this.

In Manifest Version 3, this work-around is no longer needed (bug 1827910).