Opera used to be a fantastic web browser, with a custom high-performance Presto rendering engine and features like tabbed windows that didn't show up in competing browsers until years later. However, the modern Opera browser is a shadow of its former self, reliant on chasing trends and meme advertising to
Awesome to hear, and good luck with it!
I just want to mention that there is a lot of configuration options in Tree Style Tab, so if it doesn’t behave exactly how you want it to, there’s a high likelihood that you just need to tweak the settings a bit.