- Open Mozilla Firefox
- In the Address bar –> Type “about:config” and press enter
- Press “I’ll be careful, I promise” button and press enter
- In the filter box type “dom.max_chrome_script_run_time”
- Change the configuration displayed in the window below to the number of seconds you want.
- Then again go to the filter box and type “dom.max_script_run_time”
- Change this value too, keep it same as above.
- Now restart firefox to take effects.