Enable three new features of Firefox 15

Firefox 15 was released. By default, three new features are disabled, including native PDF reader, tab-based "Preferences", and click-to-play plug-ins. We can enable them through about: config.

Native PDF Reader

Firefox 15 uses JavaScript (pdf. js) to open a PDF file directly in the browser. Enter "about: config" in the address bar, search for "Js. disabled", and set the value to "false ).

After setting, restart the Firefox browser.

Tagged "Preferences"

Firefox 15 opens "preferences" in a new window by default, and then opens the preferences in the new tab of the current browser by setting "browser. preferences. InContent" to "true.

"Click-to-play" plug-in

The "click-to-play" plug-in can block Adobe Flash by default, but you can click the mouse to play the video. Search for "plugins. click_to_play" and set its value to "true.

After setting, restart the Firefox browser.