Is this about the multi-account-containers extension because I don't think that the builtin container keeps this data ?

• https://addons.mozilla.org/firefox/addon/multi-account-containers/

For the MAC extension you should probably check its settings.

Hi, thank you for your help. Yes, I am refering to the multi account containers. Specifically, whenever opening a website, the extension requests 'do you want to always open ... in this container?' Attachment, attached What happened is I use a website with 3 separate logins (work, personal, etc.) and I elected to 'open this in a specific container.' Which will not work. Now I would like to clear this 'default.'

I think the data is in the <profile>/storage/default folder. Search for the folder name having your website url and userContextId.

The extension stores its data in storage/default in the profile folder (indexedDB), but this data is stored in a SQLite database and you can't remove this data easy for a specific website. I'm not using the extension, but I assume that you can access this data either via the Options/Preferences button on the about:addons page or via its toolbar button.

I located the 'website' within the Storage-Default folder. Deleted the 'site specific data.' This did not solve my impediment. Lastly, I simply 'deleted' the specific containers, then, re-added them. Problem Solved Thank you all for your contribution.

This isn't about storage used for the involved website, but about the storage used by the MAC extension that has its own GUID that you can find listed on the about:debugging page that I was talking about. Clearing specific website data won't have any effect on what configuration data the MAC extension has stored. Removing and recreating a specific container does has that effect to reset container related data like you noticed.