Having updated to Firefox 17.0 (from 16.0.2), for some reason I don't get warned when closing multiple tabs any more.
I've confirmed the relevant options are selected and am 100% certain this was working fine before updating Firefox today.
I've replicated the problem on my vista 32bit platform and on XP 32 bit too.
I also looked at the changelog for Firefox 17 but can't see any explanation for this change in behaviour, although I wonder whether this might have something to do with it "772319 No option to disable the "Close other tabs" prompt."
As I use Tab Mix Plus (add-on), I've also checked Firefox in safemode and have found the native tab warnings not working, so have concluded it's an issue with Firefox (rather than something to do with an extension).
I've checked "about:config" and "browser.tabs.warnOnClose" is set to true, as is "browser.tabs.warnOnCloseOtherTabs".
Any help would be appreciated.
Solved! Go to Solution.
This is when closing a window.
I've just tested "closing other tabs" via mouse context menu and that does generate the warning.
If you close a window and that is the only browser window then you may not get a warning because session restore might be enabled to reopen the tabs on a next start.
I'm afraid it's not that, since FF is configured to open on my homepage.
However... and apologies for this - the first thing I did was check in safemode / with addons disabled - but it appears to be a problem between FF17 and Tab Mix Plus.
If you go into About:Config with FF 17 and TMP active (even using dev builds 0.4.0.4pre.120724a and b versions), "browser.warnOnQuit" is set to false and locked on false I.e. you simply cannot change the boolean value.
However, if you disable TMP, I found "browser.warnOnQuit" still set to false (i.e. hence why the no warning on exiting multiple tabs problem was still replicated in safemode) but at least you can change the value.
The dev(s) are aware of the problem but I'm not aware of a fix date.
Just to clarify:
"However, if you disable TMP, I found browser.warnOnQuit still set to false (i.e. hence why the no warning on exiting multiple tabs problem was still replicated in safemode) but at least you can change the value."
As soon as you re-enable TMP, browser.warnOnQuit is set from true back to false and locked again. Therefore, unfortunately, setting this preference to true in safe mode does not solve the original problem.
Is there any way to lock this preference yourself (once you've set it to true), preventing TMP from setting it back to false?
The point I was making about being able to set the WarnOnQuit config to true was that my original conclusion regarding FireFox was wrong i.e. without Tab Mix Plus being active, the warning regarding multiple tabs closing functions correctly.
As I said, the TMP devs are aware of the problem but a fix date has not been confirmed. It's been suggested on the TMP forum that we may see a new build in January. Whether a fix will be part of this build is not known either.
I'm not aware of a way to lock WarnOnQuit to true, I'm afraid.
The peculiar thing about this issue is that if you have multiple windows with multiple tabs, the warning works... until you get down to one instance of FireFox.
The other point is that the latest dev build of TMP works fine with firefox 16, so clearly something has changed with FireFox 17 (and 18 - someone has confirmed the same issue with the pre-release build of FF18) i.e. whether TMP doesn't work properly because of a bug or whether it's simply to do with something having changed in FF and TMP has to change to fall in line, I don't know.
I was fully aware of what you pointed out in your previous post, but just wanted to clarify also for others following this thread that although it is possible to set the preference back to true in safe mode / with disabled TMP (like you said), this only lasts until TMP is re-eabled and therefore should not be mistaken as a solution (like I nearly but not eventually did).
Also I'm following the according thread at the TMP forum myself, being not too optimistic about another dev build resolving the issue before January either. Hence I'm back on FF16 – also due to another bug concerning FF17 creating invalid icon files when creating drag & drop internet shortcuts on the desktop of Windows XP systems including SP3, which is another story.
As for the inconsistent behavior with multiple windows (still one instance though) of FF17, I already discovered the same thing right after updating previous posts [here] and [here] assuming that this would solve the issue, but since it is at least TMP related (despite not occurring with FF versions previous to 17&18) I didn't contribute any further on this side effect here.
Thanks for the info regarding FF18, as I was about to update with a glimpse of hope, before deciding to downgrade because of the aforenamed reason.
Having skimmed through the release notes as well, not seeing any changes to warnOnQuit after FF13, but lots of trouble with warnOnCloseOtherTabs according to Bug 277079 and Bug 772319 (which you mentioned, also being discussed in the first thread I linked to above), however, I'm equally unsure about who's to blame in the end. To my notion, the impacts of both settings in the preferences weren't only inconsistent, but also didn't actually reflect the option menu choices anymore in FF17. Now having banned this version I can no longer investigate these issues to specify them in detail, of course.
I have this problem too. i have tab mix plus but in my case browser.tabs.warnOnCloseOtherTabs and browser.tabs.warnOnClose are both set to true but i still get no warnings which sucks because i accidently click on close alot.
That's rather clever. How did you manage that (getting those configs to those settings)?!
Could you post your build versions of FF and Tab Mix Plus?
Weird that you've got your config to those settings and it still doesn't provide warnings on close...
Can you confirm what happens if you disable TMP, then try to close multiple tabs? It should warn you. If not, double-check the about:config settings already mentioned...