Mozilla Facebook Container未自动启用，安装后未生效，询问是否有未文档化步骤

Hey there, I’ve run into this exact issue before with the Facebook Container extension—let’s walk through some under-documented checks and fixes that usually get it working:

• Double-check container permissions: Sometimes the extension doesn’t get full site access automatically. Go to about:addons, find Facebook Container, click "Permissions", and make sure "Access your data for all websites" is enabled. The official docs might not explicitly mention this if you installed it via the Firefox Add-ons store, but occasional permission glitches can prevent the container from triggering.

• Manual cookie reset (beyond initial install): The extension is supposed to clear Facebook cookies on install, but leftover cached data might bypass this step. Head to about:preferences#privacy, under "Cookies and Site Data" click "Manage Data", search for "facebook", select all matching entries, and delete them manually. Restart Firefox afterward—this forces the container to take over when you next visit Facebook.

• Check for conflicting extensions: Other privacy-focused tools (like ad blockers, cookie managers, or alternative container extensions) can interfere with Facebook Container’s functionality. Temporarily disable all other extensions, then test accessing Facebook. If it works, re-enable them one by one to pinpoint the conflict. The official docs don’t always call out specific conflicts, but this is a common hidden gotcha.

• Verify global container settings are enabled: Go to about:preferences#containers, and ensure "Enable Containers" is checked. It’s rare, but this global toggle can get accidentally turned off, and Facebook Container relies on it to function properly.

• Reinstall with a clean profile state: If none of the above fixes work, uninstall the extension, restart Firefox, then reinstall it. Before reinstalling, clear leftover extension data: go to about:support, click "Open Folder" next to "Profile Folder", navigate to the extensions folder, delete any file/folder related to Facebook Container (look for IDs like @facebookcontainer), restart Firefox, and then reinstall the extension. This resolves issues where the initial install didn’t set up the container correctly due to corrupted profile data.

内容的提问来源于stack exchange，提问作者myselfmiqdad