This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

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

Cuireadh an snáithe seo sa chartlann. Cuir ceist nua má tá cabhair uait.

How can I reset only Thunderbird's composer preferences to defaults?

  • 4 fhreagra
  • 1 leis an bhfadhb seo
  • 1 view
  • Freagra is déanaí ó Ettore Atalan

more options

Deleting prefs.js in User profile is quite big for the problem of unable to write after a smiley. Maybe just the composer preferences are messed up due to an update or something else.

Regards, Ettore

Deleting prefs.js in User profile is quite big for the problem of unable to write after a smiley. Maybe just the composer preferences are messed up due to an update or something else. Regards, Ettore

Réiteach roghnaithe

Please check to see if this being caused by an addon extension conflict. start Thunderbird in 'Safe Mode' and test.

In Thunderbird 'Help' > 'Restart with addons disabled'

If it works, then it is possible that one of your addon extensions is causing a conflict. Restart as normal 'Menu icon' > 'Add-ons' disable one at a time and restart Thunderbird. When it works ok, you will know which addon caused the problem.

Perhaps the addon needs updating.

report back on results.

Read this answer in context 👍 1

All Replies (4)

more options

Réiteach Roghnaithe

Please check to see if this being caused by an addon extension conflict. start Thunderbird in 'Safe Mode' and test.

In Thunderbird 'Help' > 'Restart with addons disabled'

If it works, then it is possible that one of your addon extensions is causing a conflict. Restart as normal 'Menu icon' > 'Add-ons' disable one at a time and restart Thunderbird. When it works ok, you will know which addon caused the problem.

Perhaps the addon needs updating.

report back on results.

more options

There are no addons installed, but the problem disappeared permanently after only one start of Thunderbird in 'Safe Mode' with addons disabled.

What was changed in 'Safe Mode'?

more options

Safe Mode temporarily affects the following:

  • All extensions are disabled.
  • The default theme is used, without a persona.
  • The Just-in-time (JIT) JavaScript compiler is disabled.
  • The userChrome.css and userContent.css files are ignored.
  • The default toolbar layout is used.
  • Hardware acceleration is disabled.

I would start by seeing if this is being caused by the Hardware acceleration.

'Menu icon' > 'Options' > 'Options' > 'Advanced' > 'General' tab

  • under 'Advanced configuration'
  • uncheck 'Use hardware acceleration when available'
  • click on OK

Restart Thunderbird.

more options

I meant that the problem is gone also in normal mode, since I've started Thunderbird once in 'Safe Mode', but I don't know why.