Bookmarklets are effectively dead, unless they're extremely simple or you use Firefox. It's kinda ridiculous that they've been effectively blocked by changes to browsers (like chromium-based ones) that make it nearly impossible to run JavaScript from the address bar, along with "Content Security Policy" rules that enable widespread blocking of inline scripts.
It's unfortunate that browser developers want to fully derisk all potential security holes, because that also means removing the choice from the end user. This ends up being security by infantilization.
You could probably still run a JavaScript program from the developer console, though. (However, I think that does not allow it to run from bookmarks, unless it already can.)
> It's unfortunate that browser developers want to fully derisk all potential security holes, because that also means removing the choice from the end user.
I agree with you, it is unfortunate. (There are other cases of this too, though.) (I think there are other ways to fix security issues though, while allowing more and better control by the end user; but, they don't tend to do such things.)
I can't confirm this. Here, bookmarklets are working just fine on all browsers, including chromium-based ones.