Removed Disconnect from, and added AdBlock Edge to, Android Web Browser ...

...Addons

Removed Disconnect from Android Web Browser Addons because it is, at least, not compatible with Firefox 29 & 28 (possibly order versions as well).

Added AdBlock Edge to Android Web Browser Addons because it is compatible with Firefox for Android and is recommended for other platforms.

My 1st attempt at a contribution to an open-source project on GitHub.  Please inform me about any mistakes/errors/gaffs.