How to Open Link in New Tab in GitLab Using Ctrl+Click

In many cases, installable web apps are just bookmarks. In Google Chrome they are called hosted apps.

In addition to just acting like bookmarks, however, web apps can take advantage of additional permissions when they are "installed". They can run in the background (for notifications when a browser window is not open, for example), use unlimited storage on the local computer, or have access to geolocation data.

Of course, all this depends on the web app developer actually writing the code to take advantage of these extra permissions.

A bit late, but ..
I, myself, have finally had it with there being no replacement for the "really delicious" addon from the old days you speak of. Not only has the old addon that I have kept running finally gone to a state of too many bugs, after days of searching I didn't find anything close to what was offered by it before (on any browser!).
So, I think it's gonna fail sooner or later if you even find a solution for that specific addon.

So I decided to take it upon myself to create something similar.
Here is my new project about it.
Currently only a toolbar tags-dropdown though, very soon a migration guide and later a sidebar.

I hope you are one of the fellows who remember the "good times" and I am not too late with all this. I fear most people might have given up earlier.