
All versions of Firefox with the Australis UI is broken for me.
Hey, I've been having a problem with post-v28 Firefox. The Hamburger/3-Line button does not open for me in the Australis UI, and the about:customizing page does not open. It's just a blank page. Also, I think the newer Firefox has some problems with Session Manager, but I've been concentrating on the non-functioning vanilla stuff.
I've tried Uninstalling and Reinstalling, Safe Mode, Uninstalling with Revo Uninstaller, Manually deleting profile and program files, and trying non-Mozilla Firefox builds. Nothing works except going for ESR builds before the Australis UI was implemented (Pale Moon in particular).
Moambuepyre
Opaite Mbohovái (3)
Update your browser inslusive all addons and extension they are quite old. It will work try it.
Sorry, but I was using Pale Moon when I made that post. That may have given the wrong impression of my Firefox setup. I would change the "System Details" section of the question if I knew how. The Mozilla support forums seem hellbent on stopping any attempts of correcting my initial error.
My Firefox install doesn't work even with a clean install or in safe mode. I deleted pref.js and localstore.rdf as well as used the "Restart with Addons" disable option. Both options redundant since they were performed on a clean install, but neither helped. Currently, I am running a vanilla Firefox 31 install without any addons and with all plugins disabled. The only option thing I changed (besides disabling the plugins) was ticking off the "Don't load tabs until selected".
Currently, with even just a clean install, the hamburger menu doesn't open, the about:customizing page just opens and stays blank, and Firefox just opens to about:newtab with the little speed dial type boxes automatically hidden.
If it would help, I can post the correct Troubleshooting Information from about:support.
I used to have the exact same problem on Firefox versions with Australis UI. Hamburger button did not react, about:customizing blank, and the browser always starting with a blank page.
Turned out to be a conflict with my custom windows theme. I am using windows 8.1 and had downloaded and installed a custom theme from deviantart. It caused the Australis UI to bug. After switching back to a standard windows theme Firefox could be used normally again (working hamburger button, about:customizing actually working, and on restart it would load the tabs I wanted it to load :))