: Firefox 93 began blocking downloads that rely on insecure (HTTP) connections even if they were initiated from a secure (HTTPS) page, protecting users from "mixed content" vulnerabilities. Technical & Compatibility Notes
: This update improved the "SmartBlock" mechanism that provides replacements for commonly blocked trackers, ensuring that websites don't "break" when tracking protection is set to Strict. Firefox 93.0 Free Download 2021
: Introduced Firefox Suggest , a feature designed to provide relevant search suggestions while prioritizing user privacy by minimizing the data sent back to Mozilla. : Firefox 93 began blocking downloads that rely
: To prevent memory exhaustion, Firefox 93.0 automatically unloads least-recently-used tabs when system memory is critically low. This process preserves the tab's state so it can be reloaded exactly where you left off when you click back on it. : To prevent memory exhaustion, Firefox 93
: The built-in PDF viewer gained the ability to fill out more types of forms, including XFA-based forms used by many government agencies.
: This version added native support for the AV1 Image File Format (AVIF) , which offers significant bandwidth savings for websites compared to JPEG and WebP while maintaining high image quality.