You can use the Ctrl+Shift+I keyboard shortcut. There is a developer button in the "3-bar" Firefox menu button drop-down list.

• Firefox/Tools > Web Developer > Developer Toolbar (Shift+F1) > click the "Toggle developer tools" button

Thanx - I will try that wheeze, it may work on FF Portable 34. in desperation I installed Firefox Developer edition because I was using Firefox Portable (34.0.5) as my main development engine on sticks & fast external HDDs.. Hmmmmmmm Let us just say that the Developer Edition can't give me working breakpoints (within functions) on my 600 line JavaScript, locally. When connected to the internet and running similar pages on the web I get erratic breaks where no breakpoints exist. Maybe it can't handle the other 500 code lines ( a lexicon) and it has exceeded some limit that was not there before. eg http://stroudvoices.co.uk/c/ The original problem was to do remote debugging on an Android phone. That failed completely. Worse - I can't run my pages on Chrome/Android now because FF/Android was defaulted and after removing that default Chrome is no longer offered.

Looks like I have to abandon all updates on Portable Firefox as a precaution. That at least behaves as a debugging environ. Or make IE &/or Chrome as my preferred SDK. I am not looking forward to future "improvements".

cntrl shift i gives me the console. I have been using that and the script display pages since before FireBug was made redundant. I don't think FF portable can do as much (theoretically). It is only v34 after all. But then most of what it does it does, see above. The worst anomaly is that often some scripts don't display until re-loaded at least once, but the Developer Edition 36 is exactly the same in that.