that is what tor browser is recommending, but they refuse to bundle any ad blocker for different reasons which make sense. but I can't browse with ads, I need uBlockOrigin...
so my thoughts are, if you install any extension you become more unique among tor browser users, and you have same uniqueness for all pages/tabs you load.
what if you appear unique every time you load any page in any tab?
check this: InviZible Pro: increase your security, protect you, thoughts (android)
(not JS, but should help with mobile)