Phase Team
Published on
February 16, 2026

: Patched a vulnerability where the address bar could be spoofed via XSLT error handling.
Searching for "download Thunderbird 91.13.0" exposes you to risk. Third-party websites know that users want old software, and some package malware, adware, or modified binaries.
Mozilla does not serve old versions on the main thunderbird.net homepage. The correct repository is:
: Patched a vulnerability where the address bar could be spoofed via XSLT error handling.
Searching for "download Thunderbird 91.13.0" exposes you to risk. Third-party websites know that users want old software, and some package malware, adware, or modified binaries. download thunderbird 91.13.0
Mozilla does not serve old versions on the main thunderbird.net homepage. The correct repository is: : Patched a vulnerability where the address bar