A free email application from Mozilla that`s easy to set up and customize

Thunderbird for Mac

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Download Thunderbird 78.10.0

  -  66.5 MB  -  Open Source

What's new in this version:

Fixed:
- Usability & theme improvements on Windows

Various security fixes:
- Out of bound write due to lazy initialization
- Use-after-free in Responsive Design Mode
- Secure Lock icon could have been spoofed
- More internal network hosts could have been probed by a malicious webpage
- Blob URLs may have been granted additional privileges
- Arbitrary FTP command execution on FTP servers using an encoded URL
- Incorrect size computation in WebAssembly JIT could lead to null-reads
- Port blocking could be bypassed
- Race condition when reading from disk while verifying signatures

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