The browser is the most heavily used and useful application on your computer and mobile device. Here are a few tips that can be helpful, especially when working with Google Apps.
Use 'New Incognito Window' in Chrome & 'New Private Window' in Firefox
Working with multiple Google identities can sometimes be challenging. This is especially true if you help other users with their services or Google Apps domains. Leverage Chrome's Incognito mode or Firefox's Private mode to access Google services under other identities if you don't want to impact your current logins.
If you're having issues with Chrome, trying Incognito Mode can also be helpful. If you don't see the same issue in Incognito Mode as you do in the regular browser window, your issue may be with one of your Chrome Extensions. It's always a good idea to delete or at least disable extensions you don't need or are not using - you want to try and keep your browser clutter free.
Have multiple tabs open when starting the browser
Sometimes you want it to be as easy as possible to get to your Google services. Chrome and Firefox can help make this easier.
Chrome allows you to set the tabs you want to open when you start your browser. In Settings you can set Chrome to "Open a specific page or set of pages" on startup.
Similarly in Firefox's Preferences, you can set your "Home Page" to be multiple pages, or Apps in this case.
Having the Gmail, Calendar, Drive and other web apps open automatically can be a great time saver. This is especially true for people unaccustomed to working with web apps.
Sync your browser activity across all your devices
Chrome and Firefox can both keep your browser settings, bookmarks, tabs, history, and even passwords synced across devices. You'll need Chrome to do this for iOS, Firefox is only available on Android. Note: you never want to sign in and sync Chrome or Firefox on a public or untrusted computer. Use Incognito or Private Browsing modes in these scenarios.
Mobile devices are playing an increasingly larger role in our daily lives. The ability to sync your browser across all your devices is incredibly helpful. Gone are the days of different bookmarks on different devices. Chrome or Firefox become YOUR Chrome or Firefox. Chrome on your smartphone or tablet knows the content you were working with on your PC. The only thing more useful than any browser, is YOUR browser.
The Ultimate Killer App
The browser is the ultimate killer application. It is the most important application you have access to on your PC and mobile devices. As long as you have access to a browser, you have everything you need. If you really want to understand the browser. Check out this booklet from the Chrome team.