Somehow my facebook only opens at mobile view even when I disable this extension or turn the extension off

DOES NOTHING IN NEW FIREFOX! Nothing on Wiki, Google, Duckduckgo, Stackoverflow..... Useragent changes, but pages do nothing, even if changing window width...🤦🏼‍♀️😓👎🏼🤦🏼‍♂️🤦🏼

Just work for many sites... You can uso to pload instragram photos from desktop browser!

As new feature must be activa "per window" or "per tab" only and not for all open tabs...

the addon is good but there is one problem is it's open in all pages of the browser.
Can you let the addon to affect only on the page I choose. not all the pages