Including non-binary people was not the problem. Relevant quote:
"AnitaB.org, the nonprofit that runs the conference, said there was “an increase in participation of self-identifying males” at this year’s event. The nonprofit says it believes allyship from men is important and noted it cannot ban men from attending due to federal nondiscrimination protections in the US."
They identified as male, not non-binary, and the event allowed men to come.
That is actually Unity. It's a mildly modified version used in Ubuntu Unity. Also, Xfce was also misspelled as XCFe.
Dragging tabs around and to new windows is much less seamless, the having it contract and automatically expand on hover is much harder (userChrome.css hacks compared to a single button), and it requires a CSS hack to remove the horizontal tab bar. I use Tab Center Reborn myself, but Edge does it better than anything I've used.
It has a really good implementation of vertical tabs. Vivaldi and Firefox are somewhat close, but they're not nearly as polished.
That's fair. Some Firefox forks, like Pulse and Floorp, have native vertical tabs, but I don't know about your other issues, and forks have their own potential problems.
Both Vivaldi and Edge have vertical tabs.
userChrome.css, vertical tabs, better integration with the host system than Vivaldi or Edge, and support for fling scrolling that's not insanely fast on touchpads.
Behavior-based antivirus is extremely difficult, failure-prone, and almost entirely unnecessary because of how secure Linux is, so they don't exist to my knowledge. Signature-based antivirus is basically useless because any security holes exploited by a virus are patched upstream rather than waiting for an antivirus to block it. ClamAV focuses on Windows viruses, not Linux ones, so it can be a signature-based antivirus, but not many people run an email server accessed by Windows devices or other similar services that require ClamAV, so not many people use it, and nobody made any alternatives.
If you're worried about security, focus on hardening and updates, not antiviruses.
Just a commercialized Matrix server with some well-integrated bridges.
You can use Element, Schildichat, Fluffychat, or anything else with it if you prefer. It's just a Matrix server with some bridges and a fork of Element.
Have you tried OpenRGB?