Browser that opens mail popup

You're looking for a browser that can open a mail popup or compose a new email directly from the browser. Here are a few options:

1. Google Chrome: Chrome has a built-in feature called "Compose Email" that allows you to compose a new email directly from the browser. To access it, click on the three vertical dots in the top right corner of the browser, then select "More tools" > "Compose email".
2. Mozilla Firefox: Firefox has a similar feature called "Compose Email" that can be accessed by clicking on the three horizontal lines in the top right corner of the browser, then selecting "Compose email".
3. Microsoft Edge: Edge has a feature called "Email" that allows you to compose a new email directly from the browser. To access it, click on the three horizontal dots in the top right corner of the browser, then select "More tools" > "Email".
4. Opera: Opera has a built-in email client called "Opera Mail" that allows you to compose and manage your emails directly from the browser.
5. Vivaldi: Vivaldi is a browser that is based on Chromium and has a built-in email client called "Vivaldi Mail" that allows you to compose and manage your emails directly from the browser.

Additionally, there are also some browser extensions that can provide similar functionality, such as:

• Mailvelope: A Chrome extension that allows you to compose and send emails directly from the browser.
• Email This: A Firefox extension that allows you to compose and send emails directly from the browser.
• Compose Email: A Chrome extension that allows you to compose and send emails directly from the browser.

Please note that some of these features and extensions may require you to have an email account set up on your device or online.