Firefox v4-56 users:
Go grab Search Engine Creator by hipsterlynx
Afterwards go to your addon manager, locate Search Engine Creator, and click its corresponding "Options" button. Depending on your browser version/theme you'll see something like this
For Google searches copy the following link into the "Search URL" field:
Name it, optionally choose a favicon image for it, and click "Create Engine"
You've got something like this in your search engine bar:
Now it just takes 2 clicks for Google image searches to no longer include Youtube thumbnails hosted on i.ytimg.com
Optionally edit the url to block all sort of domains
Right click the URL bar and select "Edit search engines"
Locate the "ADD" button and click it
For Google searches copy the following link into the bottom field:
Name it, keyword it, and save it
Locate its corresponding vertical ellipsis button, click it and then select "Make default"
This method effectively is twice as laborious coming in at 4 clicks to switch between search engines as compared to the Firefox way
Again, you can edit the url to block all sort of domains
Gauche has let go of the weenus
What is the main reason for doing this?