Greasemonkey's user-friendly scripts work in Firefox, Opera, Chrome and Safari. What about Internet Explorer? After all, there are often situations when you have to use the browser built into Windows, and it would be nice to do the work in it more conveniently.
Everything turned out to be quite simple: support for custom scripts in JavaScript is in the well-known addon
IE7Pro . Consider installing a script in Internet Explorer on the example of
YouTube HD Suite .
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The authors of IE7Pro recommend using their own
iescripts.org , but it’s rather poor in content, so go to the
userscripts.org site and select the script you like. Script files on userscripts are presented in the form of a low-informative “number script.user.js”, so when saving, rename the file to “YouTube HD Suite.ieuser.js” (the extension .ieuser.js is important for IE7Pro).

The file is saved in the \ Program Files \ IE7Pro \ userscripts (\ Program Files (x86) \ IE7Pro \ userscripts for 64-bit Windows) folder. In fact, it is very strange that the plugin uses the Program Files folder to store user data and can not be changed only if you do not install the add-on in another folder in advance. Anyway.
Go to the settings of IE7Pro, select the "Scripts" page, put a tick on "Allow custom scripts" and on the newly installed script. If it is not already in the list, you can click the "Reload All" button.

Done! Open YouTube and check.

