Hello.
I use the Web Clipper version 2.1.3 on Firefox 89.0.2 but when I want to use it, it just displays Permission needed:

The clipper server is enabled:
I don't know what's wrong.
Thanks
Thank you @laurent.
It seems Firefox automatically has updated the Clipper but I have not updated Joplin.
I updated the Joplin to the newest version and solved the problem.