Developer's Response Rated 5 out of 5 stars
The developer of Extended Statusbar has responded to an email I sent him with regards to his add-on not working with FF29. His response is below......
Thanks for the support and for using Extended Statusbar. Mozilla has made a lot of changes since the last time I worked on ESB, so it's not that easy for me to make it work with FF 29. I will do my best to update the extensions in the next few weeks, but I can't promise anything.
In the mean time I released the source code on GitHub https://github.com/kustodian/extended-statusbar in GPL 3.0 license, so if anyone is interested in helping out I will be more than happy to accept pull requests on GitHub and release the changes on addons.mozilla.org as soon as possible. I will announce this on the ESB page on addons.mozilla.org in the next few days.