Has anyone tried browser extensions for TikTok automation?

I've been struggling to grow my account organically - manually following/unfollowing people takes FOREVER. Been seeing some Chrome extensions that claim to automate this stuff, but I'm skeptical.

Has anyone actually tried browser-based automation tools? Do they work or is it just another scam?

I'm mainly looking for something that can:

• Auto-follow users in my niche
• Track follow-back rates
• Download videos I want to repost (with credit obviously)

Would love to hear your experiences before I waste time testing random extensions!
For me the best is : chrome extension