Matthew SloweMar 31

Latest #firefox #ESR (v149.0) appears to have stopped reporting the HTTP error code when something goes wrong… in this case for a 403. It used to include the HTTP code and some useful words.

In this error, it looks like the connection just didn't work rather than we got an error from the server.

Is there a way to turn this back on?

Show threadDaniel Fisher(lennybacon)
@fooflington
@firefoxwebdevs can probably help. Hopefully.
Apr 1 at 9:14amWeb
Show threadFirefox for Web DevelopersApr 1
@lennybacon @fooflington looking into it. It's fixed in Nightly.
Show threadDaniel Fisher(lennybacon)Apr 1

@firefoxwebdevs @fooflington Thanks for the update.

And it’s super cool you are here!

Show threadFirefox for Web DevelopersApr 1

@lennybacon @fooflington https://bugzilla.mozilla.org/show_bug.cgi?id=2023800#c14 - the fix is in the process of being uplifted to 149.

Thanks for pinging me on this! But it looks like a fix will land in 149 (and 150) soon.

2023800 - New certificate error pages contain misleading information on http errors

RESOLVED (jbrown) in Firefox - Security. Last updated 2026-04-01.

Show threadMatthew SloweApr 1
@firefoxwebdevs Brilliant, thankyou