Yahoo連動検索プラグイン is a free Chrome add-on developed by tecoyan. It falls under the category of Browsers and is specifically classified as an Add-ons & Tools program. This plugin allows users to display search results from Yahoo directly on any web page.

By selecting and releasing text (words or phrases) on any website while holding the Ctrl key and left-clicking the mouse, a pop-up with options for OK or Cancel will appear. Clicking OK triggers a search using "yahooサーチ" (Yahoo Search). This feature comes in handy when you want to look up the etymology or meaning of a specific word or phrase.

With Yahoo連動検索プラグイン, users can seamlessly access Yahoo search results without having to leave the webpage they are currently on. This convenience makes it a valuable tool for those who frequently engage in online research and seek quick access to information.