clear API cache not working

[pederdm000]

Describe the bug
clear API cache button not working correctly

To Reproduce
Steps to reproduce the behavior:

1. Go to '...'Terms of Service; Didn’t Read options on Firefox add-on
2. Click on clear API cache
3. restart Firefox
4. old cache still there

Expected behavior
API cache not cleared even after browser restart

Desktop (please complete the following information):

• OS: windows 10 pro
• Browser: Firefox
• Version: 85.0 (64-bit)

Extension (please complete the following information):

• Version: [e.g. 4.0.3]
• Packed? [Yes]

Additional context
Add any other context about the problem here.

• I make sure not to use an API override
• I make sure not to use a shield override
• I make sure not to use an updatecheck override

[ptgms]

Closed due to this being part of the old extension that is no longer supported.