Click to Launch Salesforce 1 Application.
One click launcher for Salesforce 1 platform - useful for
Salesforce and Force.com platform
Joshua Birk from Salesforce.com had also developed an application to that launch Salesforce 1 in new window check this out as well
https://chrome.google.com/webstore/detail/salesforce1-demo/kalbgfbifcaigjnkgagbeimcflnaijmc
Try Toggle it - to toggle developer mode in Salesforce ON/OFF
https://chrome.google.com/webstore/detail/toggle-it-by-oyecode/cjpcmpioceijmelkgknddeiljogoakbl