Yes. It requires a free account that provides 25 free searches/month. Your can upgrade your account for more.
Each time you visit a website, simply click Hunter's icon in Chrome to get a list of email addresses directly in your browser.
The extension displays every email address found on the web associated with the domain name of the site you're visiting. For each email address, the extension will provide the sources where the email was found along with its discovery date.
No, the extension will never be used to save data from the content of the pages you visit. The email addresses displayed are exclusively email addresses our own crawlers found public on the web.
There is no limit on how many leads you can save. The only limit is the number of email addresses you can search, defined by your plan.
Visit the page of the extension in the Chrome Web Store and click "Remove from Chrome". You can also remove it from the extensions manager in Chrome.