However, since JS is so powerful and ubiquitous, some users may wish to disable the feature entirely due to security or privacy concerns.
- In the address bar at the top of any Firefox window, type: about:config and then press ENTER on your keyboard. If you see a warning about modifying advanced configuration settings, click the Accept the Risk and Continue button.
- You will see a page that has a search box at the top labeled Search preference name.
Each row in the results represents a different setting that will alter the way Firefox behaves. Be careful not to change any settings accidentally.
The results contain three columns; the first showing the name of the setting, the second indicating a value (typically a number or text that indicates true or false), and a third containing either a toggle button or a pencil. The toggle button will switch the setting between preset values (such as true or false), while the pencil allows manual entry of the value.
You may also see another button to the right representing a left-pointing circular arrow for some entries— this is the reset button. The reset button appears for modified settings. Clicking on it will restore the Firefox default value, and the button will disappear.
Once you’ve changed the setting, you do not need to do anything else to apply the changes; modifications to Firefox settings are immediate: You can close the tab or navigate away to another website.
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