You can use the site: parameter in search engines like Google, Bing or Yahoo to search only a specific website. The site:ghacks.net firefox command for example displays all Ghacks pages that refer to the Firefox web browser that the search engine has indexed.
You can use the command to narrow down search results to a single domain. This can be useful if you only want to search that specific site, say to find articles about something on Wikipedia, items on eBay or Amazon, or phone numbers on Microsoft's website.
The Firefox add-on Search Site makes the search parameter more accessible by providing direct access to it. Once installed in Firefox, you can use it to search for selected text on the site you are on.
So, if you are here on the site and notice something of interest, say the term Windows 8, you can highlight it, right-click it afterwards, and use the search site context menu item to search only on this site for that term.
The Search Site extension for the Firefox web browser provides two options to access the site search parameter.
The first is by highlighting text on a website, right-clicking and selecting the "search site for selection" option in the context menu. This will open a new tab in Firefox that displays the results of a site: parameter search in the default search engine of the browser.
Changing the default search engine has a direct effect on this function, which means that this method is always using the default browser search engine.
The extension is therefore not limited to Google (the default search engine) but can be used in conjunction with any other search engine supporting the site parameter.
The second option is to click on the site search button that has been added to the search toolbar. Entering a search term into the search toolbar and clicking on the site search icon will perform the site: search instead of a normal web search for the term.
Update: Recent versions of the browser extension support additional search options. You can use the shortcut Ctrl-Enter for example to search the current site from the search bar, or click on the search icon after you have entered a search term into the bar instead for the same effect.
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Ghacks is a technology news blog that was founded in 2005 by Martin Brinkmann. It has since then become one of the most popular tech news sites on the Internet with five authors and regular contributions from freelance writers.