Safari extension does not appear in Safari>Extensions. Is it because I am running the non-app store alpha?
Clicking Open Safari Settings causes the "Needs Setup" to change to "Could not open"
I am experiencing the same issue
Same here. Even with "allow unsigned extensions" ticked on it doesn't appear at all.
Same here, I am on the stable version
I'll look into this soon! Could be some signing issue.
Same here! On 6.609 MacOS 26.4 (in case it helps your development) 
Experiencing this running BTT 6.629 (2026070902) on MacOS 26.5.1 (25F80).
what this extension supposed to be doing?
it speeds up various things like the active_website_url variable retrieval or the predefined action to execute javascript in the browser