A simple extension that does what it says. Works well for me.

Removes a lot of the extra Google stuff, and makes the search noticeably faster when it would otherwise try to load a bunch of photos.

Maybe I'm using it wrong but I have it activated and the udm=14 parameter does not appear in my google search urls. EDIT: After you install the extention, go to settings>search and change the default search browser to umd 14

It does the thing it says it does.