Just delete the Bookmark by right clicking it and clicking delete. It isn’t anything more than a link. Nothing gets installed.
The exception is the “Freeper Blocker” bookmarklet will hide various freepers on a post. That one reads and writes a cookie.
Was there a concern that you had with the search bookmark?
thanks,
FRAtl
I wrote a css style for FR that is dark grey and light grey but the links to external webpages are now dark blue and there is a thick red outline to the search box when active.