You will need to install a user script manager extension to install this script.
This programme is used to keep an eye on spécifique site waiting for an absent target.
To use this programme :
-place the URL of the site you want to work on in the line // @match Your Site
-place your keyword (text, php, number ......) that you want to find that you'r looking for. (note:the target you are looking for must be strictly absent in the source code of the site, check to type Ctrl + u and search using the Ctrl + f option for the keyword you want to put)
-Optional: you can customize the refresh time by changing the RefreshTime value to (natural number)