This Firefox add-on is very useful, but it would be even better if users could choose whether to switch to a new tab or stay on the current one when executing a search; additionally, there's a notable issue where any search phrase containing an ampersand (“&”) gets truncated at that point—so if I select “Linux Ubuntu & Linux Mint” on a webpage, only “Linux Ubuntu” is searched while “& Linux Mint” is ignored, which limits the extension’s functionality.