I'm thinking of trying Octo Browser for multiple accounts, but I'm not sure how convenient and secure it is. I would like to understand how much it helps to bypass blockages and how effective it really is in getting things done

I've been using Octo Browser for a while, not a bad tool in principle. It's convenient that you can work with a bunch of accounts at the same time without fear of blocking. For those who multitask on the Internet, it's a godsend. The only thing is that it sometimes slows down, but it depends on the load. Here is a full review of Octo browser review - https://cross-browser.org/reviews/octobrowser/