I have finally managed to upload my chrome extension which will help developers to search a string in their code.
You can download it from here:
https://chrome.google.com/webstore/detail/salesforce-advanced-code/lnkgcmpjkkkeffambkllliefdpjdklmi
A similar extension is also available on Mozilla as well. You can download it from here.
https://addons.mozilla.org/en-US/firefox/addon/sforcecodesearch/