Since Uptodown is known for hosting older versions and providing a secure download manager, here is a for a tool that combines the two:
If the latest version of Firefox breaks a crucial extension, introduces a bug, or is incompatible with your system, you can easily download previous versions. allows you to download old installers, which are completely free and verified. 2. Direct APK Access for Android
When downloading from some third-party sites, you often get "installers" that try to force you to install a toolbar or a different antivirus. Uptodown provides the direct executable or APK file, skipping the "wrapper" installers that bundle adware.