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Watch DRM content on Firefox

Opt out of CDM playback, uninstall CDMs and stop all CDM downloads You have the choice to globally opt out of HTML5 DRM playback. Once you opt out, Firefox will delete any downloaded CDMs from your hard drive, cease all future CDM downloads and disable DRM playback. This affects only DRM-controlled HTML5 audio and video. To opt out of HTML5 DRM playback completely, follow these steps: In the Menu bar at the top of the screen, click Firefox and select Preferences.

Firefox's protection against fingerprinting

Like other browsers, Firefox’s functionality is influenced by your operating system, hardware, graphics cards, additional software, and even the fonts you install. Some website technologies, like HTML5 Canvas, can even uniquely identify you based on how your computer draws images. Some websites, particularly those using HTML5 Canvas, look at this unique combination of factors and assign you a number, or a “fingerprint”, which makes you identifiable across the Web. This “fingerprint” is potentially used to profile you for targeted content without the use of cookies.

Fix common audio and video issues

Table of Contents1 Allow autoplay of media with sound2 You may need to install the required PulseAudio software3 HTML5 audio and video4 Digital Rights Management (DRM) protected videos5 Clear the cache6 Disable interfering extensions or ad-blocking software7 Check some Firefox settings8 Reset preferences9 Remove specific entries in the hosts file (advanced users) Allow autoplay of media with sound Firefox may be blocking media with sound from playing automatically.

Mobile Accessibility Features

This means that it is fast, and leads the industry in support of standards such as WAI-ARIA and HTML5 . Quick Navigation Web pages can be very big, complex, and contain a lot of content. When a screen reader user visits a large page it can be tiring and time consuming to step through every item on the page until they find what they are looking for.

Keyboard shortcuts - Perform common Firefox tasks quickly

Style Editor Shift + F7 Profiler Shift + F5 Network Ctrl + Shift + Qcommand + alt + QCtrl + Shift + Ecommand + alt + E Responsive Design View Ctrl + Shift + Mcommand + alt + M Page Source Ctrl + Ucommand + U Browser Console Ctrl + Shift + Jcommand + shift + J Page Info Ctrl + Icommand + I PDF Viewer Command Shortcut Next page N or J or → Previous page P or K or ← Zoom in Ctrl + +command + + Zoom out Ctrl + -command + - Automatic Zoom Ctrl + 0command + 0 Rotate the document clockwise R Rotate counterclockwise Shift + R Switch to Presentation Mode Ctrl + Alt + Pcommand + Alt + P Choose Text Selection Tool S Choose Hand Tool H Focus the Page Number input box Ctrl + Alt + Gcommand + Alt + G Miscellaneous Command Shortcut Complete .com Address Ctrl + Enter Delete Selected Autocomplete Entry Shift + Del Toggle Full Screen F11 Toggle Menu Bar activation (showing it temporarily when hidden) Alt or F10Alt or F10 Toggle Reader Mode Ctrl + Alt + RF9 Caret Browsing F7 Focus Address Bar F6Alt + DCtrl + L Focus Search Field in Library F6Ctrl + F Stop Autoscroll Mode Esc Cancel Drag-and-Drop Operation Esc Clear Search Field in Library or Sidebar Esc Close a Menu EscAltF10 Toggle Context Menu Shift + F10 Miscellaneous Command Shortcut Complete .com Address control + return Delete Selected Autocomplete Entry shift + delete Toggle Full Screen command+Shift+F Toggle Reader Mode command+option+R Caret Browsing F7 Focus Address Bar F6command + L Focus Search Field in Library F6command + F Stop Autoscroll Mode Esc Cancel Drag-and-Drop Operation Esc Clear Search Field in Library or Sidebar Esc Close a Menu EscAltF10 Miscellaneous Command Shortcut Complete .com Address Ctrl + Enter Complete .net Address Shift + Enter Complete .org Address Ctrl + Shift + Enter Delete Selected Autocomplete Entry Del Toggle Full Screen F11 Toggle Menu Bar activation (showing it temporarily when hidden) Alt or F10Alt or F10 Toggle Reader Mode Ctrl + Alt + RF9Ctrl + Alt + R Caret Browsing F7 Focus Address Bar F6Alt + DCtrl + L Focus Search Field in Library F6Ctrl + F Stop Autoscroll Mode Esc Cancel Drag-and-Drop Operation Esc Clear Search Field in Library or Sidebar Esc Close a Menu EscAltF10 Toggle Context Menu Shift + F10 Miscellaneous Command Shortcut Complete .com Address command + return Complete .net Address shift + return Complete .org Address command + shift + return Delete Selected Autocomplete Entry shift + delete Toggle Full Screen command+Shift+F Toggle Reader Mode command+option+R Caret Browsing F7 Focus Address Bar F6command + L Focus Search Field in Library F6command + F Stop Autoscroll Mode Esc Cancel Drag-and-Drop Operation Esc Clear Search Field in Library or Sidebar Esc Close a Menu EscAltF10 Media shortcuts See also HTML5 audio and video in Firefox. Command Shortcut Toggle Play / Pause Space bar Decrease volume ↓ Increase volume ↑ Mute audio Ctrl + ↓command + ↓ Unmute audio Ctrl + ↑command + ↑ Seek back 15 seconds ← Seek back 10 % Ctrl + ←command + ← Seek forward 15 seconds → Seek forward 10 % Ctrl + →command + → Seek to the beginning Home Seek to the end End Selection of Multiple Tabs These shortcuts require the tab bar to be "in focus."

How to stop Firefox from making automatic connections

For different methods and granular controls on how to mitigate this issue, see Media/WebRTC/Privacy Mozilla Wiki page. Send Video To Device Firefox contains a "Send Video To Device" feature that is disabled by default, to send HTML5 video content to a Roku, Chromecast or similar device in the same network. When this feature is enabled, Firefox will send SSDP packages (Simple Service Discovery Protocol, multicast address 239.255.255.250, port 1900) to the local network, to discover and pair with such a device.