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addons.mozilla.org blocking login, "Internal Server Error"

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trying to login to addons subsite, after proper user password I get "Internal Server Error" on all my computers

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Remove History For One Site {web link}

Open the History Manager <Control> (Mac=<Command>) <Shift> H. In the search bar, enter the name of the site. Right-click on one of the listings and select Forget About This Site. This should remove all information, including any site settings including passwords.

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Still problem even on mobile

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Note that some Add-ons accounts may require 2FA.

If you use a bookmark to access a specific page then instead navigate to this page starting with the main page or with the sign in page in case there is a problem with this bookmark.

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I have the same problem since spring 2021. After I got the Internal server error I checked Connected Services in Firefox Accounts (Hamburger menu -> Manage account) and Add-ons appeared there. I opened a new tab with addons but I was not logged in.

Another thing I tried is logging out of my browser account. When I tried to log in again Firefox showed me my old primary email that I changed in summer 2019. So I made my old email primary again and finally was able to login to the addons.

Modified by Sava Chankov

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Sava Chankov said

I have the same problem since spring 2021. After I got the Internal server error I checked Connected Services in Firefox Accounts (Hamburger menu -> Manage account) and Add-ons appeared there. I opened a new tab with addons but I was not logged in. Another thing I tried is logging out of my browser account. When I tried to log in again Firefox showed me my old primary email that I changed in summer 2019. So I made my old email primary again and finally was able to login to the addons.

good idea, FF on this desktop did have an old email for a test syncing account, but all FF sites have only my main sync email address.

After the clear FF addons still did not allow login

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