Firefox 153 is the newest ESR release designed for enterprises, schools, and other organization for long-term stability.
On the feature side, Firefox 153 introduces Vulkan Video decoding support. Firefox on Linux to date has focused on the Video Acceleration API (VA-API) that works well for some vendors but lacks official support from NVIDIA unless using the independent NVIDIA-VAAPI driver project that layers VA-API on NVDEC. There are also various embedded drivers and more not supporting VA-API. Now with Firefox there is initial Vulkan Video decode support for that modern, cross-vendor and cross-platform video acceleration interface.
Firefox 153 also brings a number of PDF enhancements, continued enablement around JPEG-XL, HDR video playback on Windows, and more.
Within the Firefox Labs area is where the experimental support for the JPEG-XL image format can be enabled. More details within the beta release notes.
Firefox 153 release binaries can be downloaded from ftp.mozilla.org.