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How to Make Mozilla Firefox Wait Longer for a TimeOut
Launch Firefox Browser.
Type "about:config" without quotation marks in the address bar at the top of the window and Press "Enter."
Click the "I'll be careful, I promise!" button.
Click the "Filter" field at the top of the window, and type "Timeout."
The window filters the configuration options available to display only those with "timeout" in the name.
Double-click an item to change the Timeout value.
For example, Double-click "network.proxy.failure_timeout" to adjust the amount of time that Firefox waits between trying
the two different proxy servers in an automatic proxy server configuration script.
Enter the new Timeout value in the pop-up window, and then click "OK."
This is How You can Make the Firefox Wait for Longer timeout.