Version 153.0 of the Firefox web browser has been released. Notable changes in this release include a change to the default local-file-access permissions for extensions, enabling LAN restrictions by default for all users, a visual indicator when a web site has access to the user's location, the ability to merge PDFs and add images as pages within PDFs, as well as experimental support for the JPEG XL image format.

See the release notes for developers for all changes that affect web developers, and security advisories for vulnerabilities fixed in this release.

Security updates have been issued by AlmaLinux (capstone, fence-agents, gimp, glib2, hplip, httpd, jackson-annotations, jackson-core, jackson-databind, jackson-jaxrs-providers, and jackson-modules-base, libtiff, maven:3.8, pacemaker, python3.14, and webkit2gtk3), Debian (samba), Fedora (c-ares, dnsx, freerdp, gpsd, libreswan, libseccomp, libtiff, mingw-python-idna, mingw-python-pip, openssh, python-pillow, wget1, and wireshark), Mageia (golang, graphicsmagick, haveged, libssh2, nginx, nilfs-utils, perl-CGI-Session, perl-Imager, perl-JavaScript-Minifier-XS, php, php8.4, php8.5, python-nltk, sqlite3, and xmlstarlet), Oracle (.NET 10.0, .NET 9.0, container-tools:ol8, firefox, giflib, glibc, go-fdo-client, go-fdo-server, golang-github-openprinting-ipp-usb, grafana, grafana-pcp, hplip, httpd, image-builder, kernel, libtiff, mod_http2, pacemaker, perl-DBI:1.641, perl-HTTP-Daemon, php:8.2, python-markdown, ruby4.0, systemd, and thunderbird), Red Hat (buildah, container-tools:rhel8, dracut, golang-github-openprinting-ipp-usb, libtiff, osbuild-composer, python-urllib3, python3.12-urllib3, python3.14-urllib3, and runc), SUSE (389-ds, chromedriver, gstreamer-plugins-bad, libreoffice, libsuricata8_0_6, podman, python311, and sssd), and Ubuntu (apache2, freerdp3, freetype, libde265, libxfont, linux, linux-gcp, linux-gcp-6.8, linux-gke, linux-gkeop, linux-realtime, linux-realtime-6.8, linux, linux-gcp, linux-gcp-fips, linux-gke, linux-gkeop, linux-hwe-5.15, linux-kvm, linux-lowlatency, linux-lowlatency-hwe-5.15, linux-realtime, linux-xilinx-zynqmp, linux, linux-gcp, linux-gke, linux-realtime, linux-gcp-6.17, linux-realtime-6.17, linux-gcp-fips, linux-hwe-7.0, linux-nvidia-tegra-5.15, linux-oem-7.0, nginx, php8.1, php8.3, php8.5, rlottie, sqlite3, and wget).