Hi

This does not sound like an issue with Firefox for Android itself, but an add-on that you have installed.

Add-ons are created by a large community of independent developers. The developer for the add-on that you are using is the best person to contact for help and support with their software. You can find their contact details by clicking on their name on the page that you downloaded the add-on from.

Netvoices said

I installed firebug add on to my mozilla Firefox for Android but I simply can't get it working in the Web pages. Please how can make it work for me.

The Firebug extension is only for desktop Firefox so even if you were to manage to install it on Android Firefox it would not work.

https://addons.mozilla.org/firefox/addon/firebug/

This is the Android Firefox section https://addons.mozilla.org/en-US/android/

As you can see there is no Firefbug version for Android Firefox https://addons.mozilla.org/android/search/?q=firebug as the author only supports desktop Firefox.

There is a Firebuglite bookmarklet, not sure how well it works with Android Firefox. https://getfirebug.com/firebuglite

Seburo said

Add-ons are created by a...

Add-ons in this case being Extensions https://addons.mozilla.org/faq