Open Bug 1883253 Opened 1 month ago Updated 1 month ago



(Firefox :: Untriaged, defect)

Firefox 123
Windows 10




(Reporter: Robert.breuil49, Unassigned, NeedInfo)


User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:123.0) Gecko/20100101 Firefox/123.0

Steps to reproduce:

French forum : (No problem with Firefox Release 122)

Site display problem :

Check in safe mode and new profile...

Actual results:

No display

No problem with Firefox ESR 115.8.0, Firefox Beta124.0b6, Edge...

Expected results:

displaying the site with Firefox Release 123 !

No problem displaying with Firefox 122.0.

Does the problem still happen if you start Firefox in Safe Mode? (Safe Mode disables add-ons, extensions and themes, hardware acceleration and some JavaScript stuff in order to exclude some possible reasons for problems.) See
And does this also happen with a new and empty profile? See

Flags: needinfo?(Robert.breuil49)

Thanks for your help.

Firefox started in safe mode: problem still exist
Create new profile: problem still exist

I can reproduce this on Firefox123.0 Windows10.
And I can not reproduce this on Firefox124.0b5 and Nightly125.0a1 as well as Firefox122.0.1.

UA spoofing (other than 123.0) seems to work fine. i.e, set general.useragent.override to Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:122.0) Gecko/20100101 Firefox/122.0.

I installed Firefox Nightly 125.0a1 and it works well on Linux.
You test it on windows and its ok too.
The issue is to install this version and wait when it will be the official version, in some weeks?

Marking issue as new as it reproduces on Win10x64 using FF build 123.0, though it seems to work fine on 124.0b5.

Ever confirmed: true
OS: Unspecified → Windows 10
Hardware: Unspecified → x86_64
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