I use my own fork of surf daily, but am having to fallback to mainstream browsers quite often these days as sites stop working on it or it's unusably slow. Slack no longer works, GitHub breaks occasionally, etc.
Is there a well-maintained fork that fixes these issues? The main repo[1] hasn't seen updates in over a year now. I read that development slowed down after the main maintainer left suckless, but I'm hoping the community will pick it up. It's an excellent minimal browser.
FWIW Slack seems to work fine in surf for me. Are you sure you have an up-to-date WebKitGTK on your system? Those kinds of issues are typically fixed there, and not in surf itself. As long as the WebKit API stays backwards-compatible, there's probably not much need for surf to change (other than for new features).