Bug 2490879 - Firefox 152.0 renders homepage config as string literal
Summary: Firefox 152.0 renders homepage config as string literal
Keywords:
Status: NEW
Alias: None
Product: Fedora
Classification: Fedora
Component: firefox
Version: 44
Hardware: x86_64
OS: Linux
unspecified
medium
Target Milestone: ---
Assignee: Martin Stransky
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-19 18:05 UTC by krrgithub
Modified: 2026-08-07 17:56 UTC (History)
13 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Type: ---
Embargoed:


Attachments (Terms of Use)
homepage config (9.73 KB, image/png)
2026-07-21 18:33 UTC, Derek Enz
no flags Details


Links
System ID Private Priority Status Summary Last Updated
Mozilla Foundation 2047962 0 -- UNCONFIRMED `browser.startup.homepage` with `data:text/plain,browser.startup.homepage=…")` incompatible since 152.0 2026-06-21 15:14:55 UTC

Description krrgithub 2026-06-19 18:05:35 UTC
As of Firefox 152.0, the browser no longer defaults to directing to https://start.fedoraproject.org. Instead, Firefox simply sets the URL to `data:text/plain,browser.startup.homepage=https://start.fedoraproject.org/` and renders the plain text string:

```
browser.startup.homepage=https://start.fedoraproject.org/
```

Note: This is not the same bug as some users have experienced in the past where the Fedora Start page is overwriting their custom homepage preference. This is a separate (possibly related, possibly not) issue where the Fedora's config no longer correctly sets the homepage.

Reproducible: Always

Steps to Reproduce:
1. Update to Firefox 152.0 on Fedora 44 without a custom homepage set prior
2. Restart
3. Open Firefox
Actual Results:
Page will render plain text config setting instead of loading the actual Fedora start page

Expected Results:
https://start.fedoraproject.org should be set as the URL and loaded instead of the text data literal.

Comment 2 Nikolas Nyby 2026-07-08 19:08:33 UTC
Duplicate bug here as well: https://bugzilla.redhat.com/show_bug.cgi?id=2020436

Comment 3 Derek Enz 2026-07-21 18:20:53 UTC
Can Confirm with Firefox 153

F45 Rawhide KDE build 20260721.

Comment 4 Derek Enz 2026-07-21 18:33:09 UTC
Created attachment 2149816 [details]
homepage config

Comment 5 Martin Stransky 2026-08-03 14:06:29 UTC
It's supposed to be already fixed - https://bugzilla.mozilla.org/show_bug.cgi?id=2047962

Comment 6 Derek Enz 2026-08-03 17:09:31 UTC
As of Rawhide build 20260731. The issue persists for me.

Comment 7 Nikolas Nyby 2026-08-03 17:16:47 UTC
Yes, same here. There are proposed fixes, please review:
* https://src.fedoraproject.org/rpms/firefox/pull-request/104
* https://src.fedoraproject.org/rpms/firefox/pull-request/105

Comment 8 Derek Enz 2026-08-07 17:56:14 UTC
As of Rawhide KDE build 20260807 the issues seems to be fixed.


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