By all means update the main Extension:EnableAbbrTags page if you so wish. I don't use mediawiki much these days so I won't have a chance to test your code, but if it works, please feel free. Thanks for your interest in the extension and mediawiki.
@SamanthaNguyen: no worries. :-) Yeah, Composer isn't really officially supported these days (although I'm not really sure why not). I use it for installing things though. :-) SamWilson 02:02, 22 December 2016 (UTC)
All of the mentioned autoblock features regarding local storage and cookies can be nullified by browser security settings / preferences. - DSquirrelGM𝓣𝓟𝓒 02:22, 3 March 2017 (UTC)
@DSquirrelGM: That's true, but there are plenty of vandals out there with browser setups that will retain the cookie, and who won't know how (or won't think) to delete it. The cookie isn't meant to be the only protection, but it is one. SamWilson 03:04, 3 March 2017 (UTC)