Provides visual cues for the destinations of hyperlinks
TargetAlert provides visual cues for the destinations of hyperlinks. For example, if a the destination of a link ends in ".pdf", then TargetAlert will display a PDF icon next to the link so that you know that it is a PDF before you click on it.
By default, TargetAlert shows such icons when you hover over the link. You can also go to the options page and configure TargetAlert so that it injects the icons automatically.
TargetAlert also gives you the ability to create your own alerts based on file extension, so you could choose your own image to display whenever you see a link to an ".exe", for example.
On some web sites, you may find the alerts distracting, so you can also choose URLs or domains that TargetAlert should ignore, such as "mail.google.com" or "docs.google.com", as shown in the screenshot.
You can get to TargetAlert's options page by entering chrome-extension://ifacldneidndihdbgfkglegmjohkplme/options.html in your browser, or by choosing Tools > Extensions from the Chrome menu, and then finding TargetAlert in your list of extensions and clicking the "Options" link associated with it.