All your Internet needs in one free application

SeaMonkey for Mac

Browse by Company

Adobe, Apowersoft, Autodesk, Avast, Corel, Cyberlink, Google, iMyFone, iTop, Movavi, PassFab, Passper, Tenorshare, Wargaming, Wondershare

SeaMonkey 2.19

  -  41.44 MB  -  Open Source
Free Download

Security Status

Sometimes latest versions of the software can cause issues when installed on older devices or devices running an older version of the operating system.

Software makers usually fix these issues but it can take them some time. What you can do in the meantime is to download and install an older version of SeaMonkey 2.19.


For those interested in downloading the most recent release of SeaMonkey for Mac or reading our review, simply click here.


All old versions distributed on our website are completely virus-free and available for download at no cost.


We would love to hear from you

If you have any questions or ideas that you want to share with us - head over to our Contact page and let us know. We value your feedback!

Download SeaMonkey 2.19

  • SeaMonkey 2.19 Screenshots

    The images below have been resized. Click on them to view the screenshots in full size.

    SeaMonkey 2.19 Screenshot 1
  • SeaMonkey 2.19 Screenshot 2
  • SeaMonkey 2.19 Screenshot 3
  • SeaMonkey 2.19 Screenshot 4
  • SeaMonkey 2.19 Screenshot 5

What's new in this version:

SeaMonkey-specific changes
- Mark -> As Read now checks the state of all selected messages instead of only the first one's.
- Notifications for mixed content blocker have been implemented.
- A new 3rd-party cookie restriction to visited websites option has been added to the Cookies pref pane.
- The context menu Search option is now available for text areas and input fields.
- Website storage mechanisms are now available in the Data Manager (localStorage, indexedDB, etc.).
- "Open Containing Folder" is now already available during download.
- See the changes page for minor changes.

Mozilla platform changes
- asm.js optimizations (OdinMonkey) have been enabled for major performance improvements.
- Improved WebGL rendering performance through asynchronous canvas updates.
- Plain text files displayed within the browser will now word-wrap.
- For user security, the Components object is no longer accessible from web content.
- Improved memory usage and display time when rendering images.
- The Pointer Lock API can now be used outside of fullscreen.
- CSS3 Flexbox has been implemented and enabled by default.
- The new Web Notifications API has been implemented.
- Added clipboardData API for JavaScript access to a user's clipboard.
- Support for new HTML5 data and time elements has been added.
- Fixed several stability issues.

Top Downloads

More Popular Software »