How to determine whether the user has switched to another tab of the current browser
15692
Is there a way to detect if a browser window is not currently active?
16965
Communication between tabs or windows
119290
User logout on browser / tab close
77035
Is it possible to detect a visitor's browsing history using JavaScript or PHP?
75964
Determine which tab in Firefox is using CPU resources?
105684
How to show an alert when user navigates to another page without filling the form?
72981
After logging off, a user is able to see the pages by pressing back button of the browser
97344
How to tell if a session is active?
129422
Rails Browser Detection Methods
19315
Can I disable Safari's pinch-to-zoom tab switcher?
57016
How to detect online/offline event cross-browser?
40434
Switching to a particular tab in VIM
27983
How can I tell if a DOM element is visible in the current viewport?
40091
Detect active window changed using C# without polling
42907
How to set it up to switch between tabs using TAB key on Macbook?
136460
Best way to detect when a user leaves a web page?
59557
Redirecting back to actual page what they were viewing before login