( xorg-server-xvfb-notty, xorg-server-xvfb-sd_notify, xorg-server-xvfb-noudev, xorg-server-xvfb-dev, xorg-server1. Create a release scraper for the German locale of Firefox 40.0.3 from mozdownload import FactoryScraper scraper FactoryScraper ('release', version '40.0.3', locale 'de') Create a candidate scraper for Windows 32bit of Firefox 41.0b9 from mozdownload import FactoryScraper scraper FactoryScraper ('candidate', version '41.0b9. it is generally installed in C:\Program Files\Mozilla Firefox) 2) Right-click Firefox- properties-details tab and click on Remove properties and personal information-just click ok 3) now a new firefox - Copy.exe is created. ( rust-i586-git, rust-git, rust-nightly, rust-nightly-bin, rustup-git, rustup) (make) 1) Go to the root folder where Firefox is installed. ( nogil-python, python38, python36, python311, python37, python39) (make) ( nodejs6-bin, nodejs-git, nodejs-nightly, nodejs-lts-erbium, nodejs-lts-fermium, nodejs-lts-gallium) (make) ( mesa-noglvnd, mesa-minimal+-git, mesa-i915g, mesa-d3d12, mesa-minimal-git, mesa-git) (make) Note: I can see the pseudo-element rendered in the page without problems. ( mercurial-hg, mercurial-stable-hg) (make) For me (Firefox 40.0.3) some pseudo-::before-elements are shown in the DOM inspector, while (in the SAME page) others are not shown. ( llvm39, llvm38, llvm8, llvm-minimal-git, llvm-git) (make) ( libpulse-bluedio, pulseaudio-pali, pulseaudio-dummy, libpulse-nosystemd-git, libpulse-nosystemd, libpulse-nosystemd-minimal-git, libpulse-hsphfpd, libpulse-airplay, pulseaudio-git) (make) ( jack-stub, jack-dbus, jack-git, jack2-git, pipewire-jack-git, pipewire-common-jack-git, pipewire-full-jack-git, jack2, pipewire-jack) (make) ( gettext-hostname, inetutils-git) (make) ( fastgcc, gccrs-git, gcc-multilib-git, gcc-git) (make) ( diffutils-git, diffutils-patched-exclude-directory-git) (make) ( clang39, clang38, clang8, llvm-minimal-git, llvm-git, clang-git) (make) ( cargo-git, rust-nightly-bin, rustup-git, rust, rustup) (make) ( sqlite-replication, sqlite-minimal-git, sqlite-fts3-parenthesis, sqlite-fossil) ( libvpx-1.6, libvpx-full-git, libvpx-1.7, libvpx-git) ( libnotify-gtk2, libnotify-id-git, libnotify-id) glib Overview of changes in GLib 2.70. ( gtk3-git, gtk3-classic-noatk-64, gtk3-typeahead, gtk3-patched-filechooser-icon-view, gtk3-no_deadkeys_underline, gtk3-ubuntu, gtk3-classic) ( ffmpeg-v4l2-request-git, ffmpeg-nox-git, ffmpeg-svt-vp9-git, ffmpeg-vp9-timestamp, ffmpeg-mmal, ffmpeg-headless, ffmpeg-shinobi, ffmpeg-amd-full-git, ffmpeg-cuda, ffmpeg-ndi, ffmpeg-libfdk_aac, ffmpeg-intel-full-git, ffmpeg-vulkan, ffmpeg-amd-full, ffmpeg-nocuda, ffmpeg-decklink, ffmpeg-full, ffmpeg-obs, ffmpeg-full-git, ffmpeg-git, ffmpeg-yt-dlp-bin)