It should be a simply add-on like that [url removed, login to view] for firefox.
Plus one feature:
The plugin add something to the url that is written in the plugin file. So I can easy write there and for example [url removed, login to view] be blocked and it writes the url to [url removed, login to view];t=60
and load, but without long delay.
So, once i have the plugin installed, if i browse to a page for example called [url removed, login to view]:
1) As usual, browser makes request
2) Plugin intercept this request before it is sent, and add for example &t=60 to url
3) Same for every url i want extend and is written in the add-on file.