ProtonMail has been fully tested and works well with most modern browsers. However, we only recommend browsers that also respect your Privacy. These include:
Please see Most secure browser for your privacy for more details. ProtonMail has also been fully tested works well with:
ProtonMail is compatible with other browsers not listed here (for example Pale Moon, IceCat, and SeaMonkey), but has not been tested extensively using them. It is therefore possible you may encounter more bugs when using browsers that are not officially supported.
The browser you are using must support the Web Cryptography API in order to work with the encryption we use.
With all browsers, we always recommend using the latest stable version available.