Can't click on install button for new add-ons or themes, literally nothing happens?
As the title suggests, whenever I click on "+ install add-on", nothing is happening. No download. No re-direction, nothing. Firefox is on default, as I just downloaded and installed it.
No plugins installed.
- User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:69.0) Gecko/20100101 Firefox/69.0
Would you please take a look at this article; especially the last three items :
Does any of it apply to your situation ?
Can you right-click the Install button and possibly download the XPI file (Save Link As) ?