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

Natao arisiva ity resaka mitohy ity. Mametraha fanontaniana azafady raha mila fanampiana.

Is there back-support for FF 4.x? If not, why not?

  • 1 valiny
  • 39 manana an'ity olana ity
  • 8 views
  • Valiny farany nomen'i the-edmeister

more options

I'd like to roll back to FF4.x until my add-ons are updated for 5.0, but I can't find 4.0 on the mozilla website (even though I can find 3.6.x). Is there a plan to have 4.0 support, or has it been so completely superseded by 5.0 that it's actually unsafe to use?

As general feedback, I'd like to suggest that the compatibility check for add-ons happen *before* confirming the update: it's just unnecessarily frustrating when something breaks and it's too late to go back.

I'd like to roll back to FF4.x until my add-ons are updated for 5.0, but I can't find 4.0 on the mozilla website (even though I can find 3.6.x). Is there a plan to have 4.0 support, or has it been so completely superseded by 5.0 that it's actually unsafe to use? As general feedback, I'd like to suggest that the compatibility check for add-ons happen *before* confirming the update: it's just unnecessarily frustrating when something breaks and it's too late to go back.

All Replies (1)

more options

Sorry, the "plan" is for 5.0 to replace 4.0.1, with no further support for 4.0.* versions.

95% of the Add-ons hosted at the official Add-ons website are compatible with Firefox 5.0 - https://addons.mozilla.org/en-US/firefox/compatibility/report For extensions that are hosted elsewhere, you can try using this extension - https://addons.mozilla.org/en-US/firefox/addon/add-on-compatibility-reporter/ - to force "incompatible" extensions to be enabled in 5.0 and see for yourself if they work. Then there's a "compatibility" button in the Add-ons Manager tab to report if each extension is working properly or to tell the developer of each extension what problems you're having.