This script automatically appends the required tag in the URL, when it finds it absent and also disables the 'Tools' panel.
Changelog: v1.0: Initial release. v1.0.1: Fixed a minor bug. v1.1: Shortened the code. v1.1.2: Script now automatically hides the 'Tools' panel. (if you don't want this then comment out the part below the if condition) v1.2: Fixed incorrect results caused while searching different sizes for a uploaded image. v1.2.1: Updated description.
This is my first ever script. Please leave a constructive feedback. :)