The safest way to download is through the Thunderbird Release Archive, which hosts every sub-version from 91.0 to 91.11.0.
Because Thunderbird 91 is a legacy version, it is no longer the primary download on the main homepage. To find it safely, you must access the official Mozilla Archive . thunderbird version 91 download
Before downloading, ensure your hardware meets the specific requirements for this generation of the software. Minimum Operating System Required Hardware Windows 7 or later Pentium 4 (SSE2 support), 1GB RAM (2GB for 64-bit) macOS macOS 10.12 (Sierra) or later Intel or Apple Silicon processor, 2GB RAM Linux GTK+ 3.14 or higher glibc 2.17+, libstdc++ 4.8.1+ System Requirements - Thunderbird The safest way to download is through the
You can often reach a specific version by modifying the official download URL, such as https://mozilla.org . System Requirements for Version 91 Before downloading, ensure your hardware meets the specific