There is an option in Firefox, hidden in about:config
browser.backspace_action :
0 : go back one page (the default on Windows)
1 : scroll up (the default on linux before 2006-12-07)
2 : do nothing (the default on linux after 2006-12-07)
For whatever reason, the BBC website defaults to flash for videos and displays an error message to install it when disabled, even though they have a usable HTML5 player they use for mobile devices. So, desktop browsers will have to pretend to be a mobile by changing the User-Agent string. Firefox removed options for site-specific strings, but addons are available to do this
https://addons.mozilla.org/en-GB/firefox/addon/uacontrol/
https://addons.mozilla.org/en-US/firefox/addon/user-agent-js-fixer/?src=search
Set the user agent to the following and limit it to the BBC News website
Mozilla/5.0 (Linux; Android 4.4.4; en-us; Nexus 5 Build/JOP40D) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2307.2 Mobile Safari/537.36
Go to about:config, search for pocket and set the following settings to false:
extensions.pocket.onSaveRecs=false extensions.pocket.enabled=false extensions.pocket.showHome=false