Hi,
Some websites are very strictly with their content and will break if we modify them. For example:
- Text nodes being used as placeholders for other elements.
- Add other text node if the original text node changed.
- Running background script to check the text content and will break/cause problem if we change even a single character.

So, I do not recommend everyone to turn on this extension for all websites. In earlier version, I turn off these options on default. However, many people don't know how to enable them and report this extension as "not working".

You can try to combine domains, blacklist and shortcuts for better experience. I have updated the description for shortcuts tab. You can use other characters on your keyboard (not limited to numpads), like: ), (, *, =, _