Simon André

**Update:** nope, better solution next comment. I think the [Request::getPreferredLanguage()](https://github.com/symfony/http-foundation/blob/7.0/Request.php#L1527) should return `null` when client has no preferred language. Updating (fixing? not sure) this would solve your problem, as the...

After a bit of git archeology... this has been the behaviour of this method since 2010. So we may not want to change it 😅 Maybe one simple solution could...

I'm having just a doubt about the second line of the "if" ``` $request->attributes->set('_vary_by_language', true); ``` It is later used by the ResponseListener to send a Vary header.. so i...

@chalasr should this be seen as feature or bugfix ? It is not obvious to me there

Your example uses the create() method... but a request in the framework created by the createFromGlobals factory, and there is no default there. The proof it happens is that it...

You can add the impersonation to any URL you'd want : just add the query parameter https://symfony.com/doc/current/security/impersonating_user.html ``` http://example.com/somewhere?_switch_user=thomas ```

Could we assume that dark background = dark mode (in most of the cases) ? We maybe could use the Profiler theme option ?

It's something between Firefox, macOS, and maybe the symfony local server? My investigations here: https://github.com/symfony-cli/symfony-cli/issues/382 You can disable in dev the weblink.. or help find a solution (i'm stuck on...

On Firefox, you may have to stop / start the local server to get a normal situation again. Do you all (@Chris53897 @sblondeau @radiz13 and anyone seeing this message and...

It's either 100% Firefox bug, or a bit of symfony-cli and Firefox. There probably are missing headers, or trouble during internal redirections.. but Firefox should not freeze like that :/