I justy joined, and have been enjoying the Random SCP feature, and reading some from the list. I thought it would help if you made the color of the link in the list change when you read the article (I forget what that is called). Also, could you include an arrow back and forward so I can go through the SCPs one at a time without returning to the list page?
Late reply, but since this hasn't been answered I'll throw in that SCP Wiki Usertools has things similar to this. For what you have specified, check out HIRTOY? (Have I Read This One Yet?), and Previous/Next Buttons for SCPs. The first is only verified as working on Firefox but the latter works on Opera, Firefox, and Chrome.
Hadn't even seen this thread or I'd have replied. In addition to what Sirens said above, note that scripts having been verified for use on Firefox only doesn't mean they won't work on Opera or Chrome, just that they haven't yet been tested on this browsers. If you try and it works, let me know and I'll edit the page. Or you can even do it yourself. :)
Huh, good to know. I think I have the other two browsers downloaded on my other devices so I'll download them and see if they work. I'll update the page/let you know if they do. Great work on those, by the way. :)
ETA: HIRTOY? doesn't seem to work on any other browser but Firefox.