The DuckDuckGo extension blocks tracking scripts, making it a useful add-on.
It makes me laugh when people talk about security in Chrome. Security in a closed source browser developed by a company whose business model centres tracking users. Okay.
Every add on you install in firefox is in itself a potential threat, so in my opinion leave firefox as clean as possible set your security and privacy and check online for the reputability of the websites you visit and the programs you download
Good list, and I would add "self destructing cookies" to the list.
Do you recommend using Firefox Sync, incase I want to access these addons in other computers?
Panopticlick : Yes! You have strong protection against Web tracking, though your software isn’t checking for Do Not Track policies.Help us defend the Web against tracking:<links to facebook twitter G+>
Privacy Settings addon is also good.
You don't need uBlock and NoScript and PrivacyBadger.
For that matter unless you are way into tinfoil I wouldn't use NoScript or at least not recommend it for your average user because it gets super frustrating really fast. Almost all sites stop working completely unless you go through the scripts one by one. While it's obviously more safe the cons outweigh the benefits in my books. You can get rid of most threats with just uBlock, and if you add PrivacyBadger you are already partially double dipping.
Also people should remember that UA changer should be configured to use reasonable defaults, so you aren't the only guy who uses FreeBSD version 0.5 with Internet Explorer 12 for example. Also you probably don't want to be a mobile device with 5k resolution display. Rotate sane set of OS and try to avoid platform specific browsers.
+1 for h3h3 pictures. papa bless