Window Close Protector is a Chrome extension that adds a warning dialog to help protect against accidentally closing multiple tabs. Whenever you try to quit the browser, or the browser tries to close a tab, it will prompt for confirmation, by offering option like Leave this Page

Print Using Google Cloud Print is an extension for Chrome that will change all that, it will let you print any file, image or Gmail email or attachment right from your browser. Now you can print any doc/pdf/txt/jpg/jpeg file, Gmail email, attachment or Google Docs document.

Mailto is a Chrome extension that opens any and all mailto: links in your online email service, ready for composing. You no longer have to copy and paste emails in the recipient field, the extension supports Gmail, Hotmail, Yahoo Mail, Fastmail and Zoho mail.

Google has updated its Gmail offline Chrome Web Store app which was announced in last August. The HTML5-powered app lets users access their Gmail even when they’re offline. The updates include improved attachments, Keyboard shortcuts support, Numerous performance enhancements.

SeoQuake is a handy analytic seo-tool for Firefox, Chrome and Opera browsers. It helps to obtain information about any site for a wide range of parameters such as page rank, Google index, Alexa and many others. The tool serves to demonstrate a number of times a keyword on web page.