Best Tampermonkey Scripts:

Violentmonkey

• Open source and actively developed for Firefox
• Compatible with 99% of scripts, fast performance
• Suitable for power users
• Preferred by many users over Greasemonkey and Tampermonkey "I personally stay away from Tampermonkey since it is closed source. Both Greasemonkey and Violentmonkey are open source. I prefer Violentmonkey of the two."

Tampermonkey

• Good script manager, but proprietary code and closed source
• Some users dislike its UI "I don't like Tampermonkey for its UI, not because it's not Open Source."

Greasemonkey

• Considered outdated and rarely updated "Greasemonkey is the "dad" of script managers on Firefox, but rarely updated."

Scriptcat (Honorable Mention)

• Open source but with a complex interface
• Unique features like Background Script, Schedule Script that Violentmonkey and Tampermonkey lack "Scriptcat is open source, can do things that both Violentmonkey and Tampermonkey can't like Background Script, Schedule Script, but its interface is Chinese, very hard to understand."

FireMonkey

• Lightweight, better performance, and privacy focused
• Allows managing and injecting User CSS "FireMonkey is the best one."

Dancemonkey

• Considered the best by some users

Pros and Cons:

• Violentmonkey: Pros - open source, fast performance; Cons - not recommended by some for privacy reasons
• Tampermonkey: Pros - good script manager; Cons - closed source, disliked UI
• Greasemonkey: Considered outdated and clunky
• FireMonkey: Lightweight, better performance, and privacy features

In summary, Violentmonkey is highly recommended for power users due to its open-source nature and fast, compatible performance. FireMonkey is another good option for those looking for a lightweight, privacy-focused script manager. Greasemonkey is considered outdated, and Tampermonkey, although a good script manager, has closed-source code that some users prefer to avoid. Ultimately, the best choice depends on user preferences and specific needs.