Firefox stops loading any page until cache is manually cleared
This issue started to happen on previous version of Firefox 89.0.1 (64-bit) on Ubuntu Linux 20.04.2 LTS Workstation on Dell Latitude 5280 laptop.
Browsing the web sites is working for a while, but than it suddenly stops loading any page until I go and manually empty the cache. Happens at different random cache sizes (200 MB, 18 MB, 2 MB, etc.). Upgraded the browser to the latest 89.0.2 but the issue still persist. The upgrade happened via the browser but also completely uninstalled Firefox and installing the new version again.
Also deleted everything under ~/.cache/mozila but still no change in behaviour. I have Ghostery and NoScript installed from your Add-On web site. Running the browser in Private Window without those add-ons loaded doesn't seem to have the same issue.