The easiest way is by using an add-on. Alternatively, you can change it manually under general.useragent.override in your about:config
Also I swear I’m not trying to be an ass, but entering “how to change user agent string firefox” in your preferred search engine would have gotten you an answer much quicker.
Change your user-agent string and what do you know they magically all work in Firefox, wow
How do you do that?
The easiest way is by using an add-on. Alternatively, you can change it manually under general.useragent.override in your about:config
Also I swear I’m not trying to be an ass, but entering “how to change user agent string firefox” in your preferred search engine would have gotten you an answer much quicker.