I think the largest issue would be hiding the plugin from their eyes. Like youtubeDL sort of being a secret. The noise creating plugin can't be advertised as such because then the new history is easily un-noiseable.

The tool would need to be something like a color picker that has a hidden command to run headerless searches in a tab of your browser.

This (sort of) worked for teenagers hiding pictures on a fake calculator app on smartphones years ago, but your mom wont try to pry at your facebook obfuscation.

Just a thought