Firefox cookies not cleared in private browsing

[logusergithub]

System

• OS name: [Windows]
• OS version: [10 21H2]
• Browser name: [Firefox]
• Browser version: [97]
• Extension version: [3.2.0]

To reproduce the issue: new profile, install 'Clear Browsing Data' and 'Cookie Quick Manager', new private browsing window or 'Always use private browsing mode'. Doesn't matter Firefox's ETP normal, strict or custom mode. CBD: all data types selected, close all tabs, 'All time' range.
According to 'Cookie Quick Manager' current 'Context cookies (private browsing)' are not cleared. After a few tries it seems to me that many other similar extensions also have the same behavior (only in private browsing) except for example 'Cookie Autodelete'.
https://i.postimg.cc/8C9dZ7tb/Cookies.png

I don't know if there is actually a issue but in case I reported it. Thanks.

Update: only if the 'All time' option is chosen.

[dessant]

The browsingData API is poorly implemented in Firefox, extensions cannot properly fix these issues.

#13
https://armin.dev/blog/2019/03/firefox-extensions-browsing-data-security/