: Firefox 52 ESR is the last official version that supports NPAPI plugins (Java, Silverlight, Acrobat).
: Standard releases used for specific legacy add-on compatibility. 🛠️ Step-by-Step Download Guide Follow these steps to navigate the official archive: Download Firefox 12-51 52 Esr
These versions are and do not contain modern security patches. Using them to browse the general internet poses a high risk of malware infection or data theft. Only use these versions for specific legacy tasks, such as accessing old internal hardware interfaces or testing legacy web code in a controlled environment. : Firefox 52 ESR is the last official