To protecting your privacy, no personal data is collected as part of the free Chrome Extensions and Firefox AddOns.
Whenever possible:
Permissions are the minimal required to function
It is obvious when it is running. This may require a click to active, prompts for required permissions or update display to show it's active
It will attempt to have a minimal system impact and will be optimize for smaller footprint.
Code is not obfuscated so it can be easily verified
Open source for transparency.
Because this is a free extension, there is no warranty associated with it.