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Cannot install any addons in Firefox 100.0.1

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FF recently updated itself to 100.0.1 and since this time I have been unable to install any addons. Every time I try to install an addon, I receive the message 'Installation aborted because the add-on appears to be corrupt.' I have uploaded a screenshot which demonstrates this behaviour. This is just an example - all addon installations are affected. My existing addons are unaffected, but if I remove one and attempt to reinstall it, the same result occurs.

FF recently updated itself to 100.0.1 and since this time I have been unable to install any addons. Every time I try to install an addon, I receive the message 'Installation aborted because the add-on appears to be corrupt.' I have uploaded a screenshot which demonstrates this behaviour. This is just an example - all addon installations are affected. My existing addons are unaffected, but if I remove one and attempt to reinstall it, the same result occurs.
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Toutes les réponses (6)

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I disabled all my existing addons and tried installaing again. No change.

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The problem with removing them is that reinstallation will fail with the same error. I will try disabling my antivirus to see if that makes a difference.

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I tried it with the antivirus and firewall disabled. No change. I am thinking that this is a settings issue.

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I have checked for updates and none are available for my addons. The problem occurs for all addons.

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It is possible that (anti-virus) security software is causing the problem. Try to disable security software temporarily to see if that makes a difference.

Boot the computer in Windows Safe Mode with network support to see if that has effect.

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Does it work to use this alternate installation method:

(A) Right-click the blue "Add to Firefox" button and choose Save Link As to download the XPI file to your computer.

If Firefox cannot save the file, then there could be a problem with the way the link redirects among Mozilla's servers.

If Firefox can save the file:

(B) Open the Add-ons page using either:

  • Ctrl+Shift+a (Mac: Command+Shift+a)
  • "3-bar" menu button (or Tools menu) > Add-ons
  • type or paste about:addons in the address bar and press Enter/Return

(C) On the right side of the page, click the wheel or gear button and choose "Install Add-on from File..." to open a dialog where you can select that XPI file.

Any difference?