Cookie Clearer for Firefox by Lav
Removes cookies for domains relating to Office 365 and Outlook.
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Extension Metadata
About this extension
On some email domains like those provided through Universities, trying to sign into Outlook will sometimes cause a loop of signing you out of your account, even after trying to sign back in. This extension will automatically remove the cookies that are causing this sign out loop through just a click of a button. Specifically, it removes the cookies for the following domains: office.com, copilot.com, live.com, cloud.microsoft, microsoft.com, microsoftonline.com, and office365.com.
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Permissions and data
Optional permissions:
- Access your data for all websites
Data collection:
- The developer says this extension doesn't require data collection.
More information
- Add-on Links
- Version
- 1.0
- Size
- 35.79 KB
- Last updated
- 9 days ago (May 15, 2026)
- Related Categories
- License
- Mozilla Public License 2.0
- Version History
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