someoneX Can you upload the script to one of the "userstyle" websites, so other users can import it with Stylus or another solution like that?
I've been away for a bit so late reply, sad to see SLR has still not changed their ways so I added a tiny script that adds the full release date on greasyfork here. Sadly because it is intended for an adult website it seems you need to login to be able to see it there. 😧 So here's also a pastebin link, this doesn't have the easy install button though.
Stylus is only for CSS and this requires a bit of javascript so you'd need a userscript extension like tampermonkey, greasemonkey, etc. Some links to those for most browsers are on the frontpage of greasyfork.
Also I should add that it only shows the "SLR release date", which is often not exactly the same as the studio release date (if they also have their own website). Sometimes it's off by a few days, sometimes weeks.