>ScriptSafe
Of the 3 privacy extensions I run (ScriptSafe, Privacy Badger, Ublock), ScriptSafe is the meanest AND the biggest pita --which makes it the most effective, I guess. Every domain and subdomain is blocked by default and you're forced to check off -often by guessing- all of the 3rd domain assets a site might use to build a page. Text usually displays even in the default mode but it can take a few trial-and-error reloads to get the pix & vids unblocked. Media sites, in particular, might have as many as 20-25 items blocked, ranging from ad networks to CDNs.
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ScriptSafe does have the option of exporting/importing your custom user data.