Source Identifier Sanitizer is a Firefox add-on designed to improve your online privacy by sanitizing URLs generated by the YouTube Share feature. By removing the 'si' parameter from these links, the add-on helps create shorter URLs that do not compromise user privacy. This feature is particularly useful for users who frequently share YouTube content and wish to maintain a cleaner, more secure online presence.

In addition to automatically sanitizing YouTube links, the Source Identifier Sanitizer also offers a manual sanitization option. Users can click on the add-on icon to paste any link they wish to sanitize, which extends its functionality beyond just YouTube to include other websites like Facebook and Instagram Reels. This makes it a versatile tool for anyone concerned about URL length and privacy.