adblocker is a general term usage only. So unless you can define what adblocker program your using others reading won't know which one this is. And then if it's a Addon that was installed you need to contact the Addon Developer for support of their Addon.

Note that it is possible that the website no longer supports your Firefox 78.15.0 version that is the last for your Mac OS.

This could be a problem with (Enhanced) Tracking Protection if you do not have content blocking extensions installed, so you can possibly click the shield at the left end of the location bar and disable Tracking Protection.

• https://support.mozilla.org/en-US/kb/enhanced-tracking-protection-firefox-desktop