Exactly what I was looking for. I use it to randomise my UA every 5 minutes for various desktop browsers to help prevent fingerprinting and tracking. I had to disable IE11 from the list since that gives errors on quite a few sites now about it being unsupported. Other than that, works perfectly.

OK. PLS add support cirilic in User Agent

m'a permis de me connecter à ma caméra IP qui refusait firefox! en mettant IE c'est passé. Merci ;)

Well that looks like to be it with YouTube as well.
I can't get it to deliver the classic YouTube any more on anything there when set to Google Bot.

YouTube sure wants to force that completely ugly polymer "tablet look" of theirs down peoples throats, even though they might risk loosing a ton of computer users because of this.

excellent

Does its job

In test, but seems easy to use and working well.
I use it for regain the OLD Youtube interface and keept my Youtube addons and userscripts working on it.
By example this one:
Youtube - Restore Classic
https://greasyfork.org/fr/scripts/34818-youtube-restore-classic
MORE Infos:
Disable Polymer not working anymore: If the extensions and scripts aren't working for you, try this workaround:
https://www.reddit.com/r/youtube/comments/h9kpbp/disable_polymer_not_working_anymore/fuzp9k4/

Thank you for fixing Youtube.

I use this for reverting YouTube back to classic template by telling YouTube that my browser is Google Bot.

Brillant. Easy to install. Works straight away. Thank you