Will come back and try later - at the moment is breaking sites.

https://play.mob.org/ for example.

When you activate the extension, the Google Accounts login page does not work. You enter the email address in the data field for username, but the extension blocks the next access to the password field.

Until I discovered that the problem was due to this extension, I had to download other browsers to verify that it was not a failure of the page, and then disable all Firefox extensions and go activating them one by one until the error is reproduced. Please, fix this problem because the extension is very good but it is a pity not to be able to use it.

Cannot scroll with keyboard ,cannot fast-scroll by home or end button

This extension blocs the keyboard scrolling and ScrollAnywhere. So you can only scroll the page with the mousse wheel.

Perfect!