Trying to add Firefox and Chrome webclippers

It tells me that I will first have to install Firefox [Chrome].

They are both already installed. In fact, I’m accessing the Devonthink support page using Firefox. So it’s telling me that i have to install Firefox while I’m using the Firefox browser.

Which version of DEVONthink, Firefox and macOS do you use? Does enabling full disk access for DEVONthink fix this?