##Google Custom Search Plugin (Site-specific search) for Firefox:##

1. Create a file called ask-ubuntu.xml at .mozilla/[profile.name]/searchplugins folder. For example, /home/nits/.mozilla/firefox/airbfsl5.default/searchplugins/ask-ubuntu.xml
2. Add the following content in it.

   <SearchPlugin xmlns="http://www.mozilla.org/2006/browser/search/"
xmlns:os="http://a9.com/-/spec/opensearch/1.1/">
    <os:ShortName>Ask Ubuntu</os:ShortName>
    <os:Description>Search Ask Ubuntu: Q&amp;A for Ubuntu users and developers</os:Description>
    <os:InputEncoding>UTF-8</os:InputEncoding>
    <os:Image width="16" height="16">data:image/x-icon;base64,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</os:Image>
    <os:Url type="text/html" method="GET" template="http://www.google.co.in/search?q=site%3Aaskubuntu.com+{searchTerms}">
    </os:Url>
    </SearchPlugin>

3. Restart the browser
4. You'll see it among the list of search-engines in the search-engine plugin. And that's it, go nuts, quicker searching AU!