This is the list of the required permissions:
"Read and change your data on hunter.io and other websites": We have to ask this permission to allow Hunter's Chrome extension/Firefox Add-on to read your data to adapt pages on Hunter's website when you have installed the extension to provide a better experience. This permission will be also used if we decide to integrate the extension on other websites in the future.
"Read your browsing history": This permission is required to get the domain name of the page you're visiting when you click on the browser button so you can make a Hunter search that corresponds to the right website. Please note the extension only reads the content that is directly required to run the features described only.
"Communicate with cooperating websites": This permission is required for communication with Hunter's website. We use it to know if you have installed the extension or not (for example to avoid sending you an email about the Chrome extension/Firefox Add-on if you have already installed it).