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How to reenable blocked extensions after Firefox update?

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  • 5 have this problem
  • 104 views
  • Last reply by alexlehm

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After updating to Firefox 27 some extensions are apparently blacklisted by Firefox, which makes it impossible to run rather vital components, which makes Firefox near to unusable for some pages, especially FDM. While it is probably useful to disable extensions without consent of the users, it is quite annoying that this is not reversible. If there is some super-secret method to renable extensions, it is not easy to find, at least my Google search didn't turn anything up.

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Are they blocked because they are not compatible with 27.0?

If you are using 27 note you are using the beta version and some extenstions dont support beta/aurora/nightly versions.

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That is a risk you take when you switch to the beta update channel.
Not all extensions are already compatible with the beta version and in such a case Firefox will disable the extension.

You can try to reinstall the extension via its Add-ons page and override this block via the Add to Firefox button (install anyway).
Note that installing an extension doesn't guarantee that the extension will work properly, so use with caution.

Otherwise you would have to edit the install.rdf file in the extension's xpi (zip) archive to bump the max-version.

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Thanks, I didn't realize that the extension was disabled during the update from release to beta (which I did to test something else). After downgrading to 26 everything works as it should.