Indeed you need to write some firefox css to use either TST or Sidebery. But it's pretty rare for it to break. It actually broke a few days ago, I fixed it in a few minutes - ctrl+shift+alt+i opens the developer tools for the browser UI itself, then it's a matter of selecting the faulty element and writing the CSS to hide it or whatever. Or, ask a LLM to write the CCS for you. Or check out https://www.reddit.com/r/FirefoxCSS/ since probably someone has posted a fix there
> even with the mods they're not as integrated as native vertical tabs.
Hmm what's Sidebery missing?
I was maintaining such a setup for a while and didn't have such luck. Sometimes it'd fully break and sometimes things would shift around due to other CSS changing, but whatever the case it's more than I had the patience to babysit.
> Hmm what's Sidebery missing?
The extensions themselves aren't lacking, but they suffer from being extensions and not part of the browser proper, which makes for occasional weird interactions and glitches and the "seams" between extension and host becoming tangible from time to time. Things just work better when the browser "knows" about the tabs being vertical and having deeper organization than is possible with horizontal tab bars, or is even designed around vertical tabs being the only option (like Arc/Zen).