Using Firefox 52 in 2024 and beyond carries significant risks. Because it is no longer updated, it contains unpatched security vulnerabilities.
Firefox 52 remains a significant version in the browser's history. It was the final version to support legacy operating systems like Windows XP and Vista. It was also the last to support NPAPI plugins such as Java, Silverlight, and Adobe Acrobat (excluding Flash). A portable version allows you to run this specific browser from a USB drive or a local folder without affecting your primary installation. Why Users Download Firefox 52 Portable firefox 52 portable download
This is the most important step. Since you want version 52 specifically, go to Options > Advanced > Update and select "Never check for updates." Using Firefox 52 in 2024 and beyond carries
If using the PortableApps version, run the .paf.exe file. It was the final version to support legacy
It is the "end of the line" for Windows XP and Windows Vista users.