Stack Overflow. Not a 'forum' per se but is otherwise built around the discussion of browser hacks.

alt.hackers or something like that maybe? IYKYK

lobste.rs is way more hacker and technical.

More than half of its front page is identical to HN's.

Only when the front page is full of technical content. There you don't see posts like:

- Elon Musk's SpaceX Allows Investment from China

- We're Still Not Done with Jesus

- Angelina Jolie Was Right About Computers

They're also little shitfucks who ban my freaking browser.

Any chance you can provide an invite?

sure, just sent it to the email in your profile

Thanks, appreciate it.

Can I get an invite too please?

Sent one to the email in your HN profile. Cheers!

Thank you x