That means that your system is shutting down if you have more than 4-5 tabs open in a browser?
Most likely one of three causes:
- Your computer overheats and shuts itself down to prevent damage to the system.
- Your system draws too much power and the power supply can't handle it and shuts down.
- The memory on the computer is faulty and once it reaches a certain amount of used memory, which happens when you open new tabs, the memory access causes an error and your computer crashes.