Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Firefox 57.0.4 on macOS doesn't warn on quit

  • 1 reply
  • 12 have this problem
  • 5 views
  • Last reply by cor-el

bryanlin850
bryanlin850
more options

Running Firefox 57.0.4 on macOS 10.12.6 (Sierra). I have the following in about:config set to "true": browser.tabs.warnOnClose browser.tabs.warnOnCloseOtherTabs browser.tabs.warnOnOpen browser.warnOnQuit browser.showQuitWarning

Some resources online mention setting warnOnRestart to "true," but there is no such option. When I quit with CMD+Q or through the Firefox menu, there is no warning before quitting and Firefox just quits even when I have multiple tabs open. I have restarted both Firefox and my Macbook after changing these settings. I would appreciate if anyone knows of a way to get Firefox 57 on macOS to warn before quitting.

Thanks for your help!

Running Firefox 57.0.4 on macOS 10.12.6 (Sierra). I have the following in about:config set to "true": browser.tabs.warnOnClose browser.tabs.warnOnCloseOtherTabs browser.tabs.warnOnOpen browser.warnOnQuit browser.showQuitWarning Some resources online mention setting warnOnRestart to "true," but there is no such option. When I quit with CMD+Q or through the Firefox menu, there is no warning before quitting and Firefox just quits even when I have multiple tabs open. I have restarted both Firefox and my Macbook after changing these settings. I would appreciate if anyone knows of a way to get Firefox 57 on macOS to warn before quitting. Thanks for your help!

Chosen solution

Are you reopening tabs automatically on the next start?

  • "Show my windows and tabs from last time"

If that is the case then Firefox wont show a warning.

There are other things that need attention.

The System Details list shows an outdated Flash plugin.

  • Shockwave Flash 23.0 r0

You can download the latest Flash player plugin for Firefox on this page. See "Still having problems".n*http://helpx.adobe.com/flash-player/kb/installation-problems-flash-player-windows.html

Read this answer in context 👍 1

All Replies (1)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

Chosen Solution

Are you reopening tabs automatically on the next start?

  • "Show my windows and tabs from last time"

If that is the case then Firefox wont show a warning.

There are other things that need attention.

The System Details list shows an outdated Flash plugin.

  • Shockwave Flash 23.0 r0

You can download the latest Flash player plugin for Firefox on this page. See "Still having problems".n*http://helpx.adobe.com/flash-player/kb/installation-problems-flash-player-windows.html