Comment 9 for bug 129749

Same bug is reproducible like this:
1) In preferences, change "When Firefox starts" to "Show a blank page" and delete content of the "Home Page" lineedit.
2) Close preferences and restart firefox
Now you get a blank page and history doesn't work.
Firefox installed from tarball also starts up with blank page at this point, but it's history works.

Note that if you don't clear the "Home Page" address line then it works even with "Show a blank page" selected.
And the bug also happens when you choose "Show a home page" but leave the "Home Page" line empty (note that you first have to set it to blank page and delete home page address, then restart firefox, select "Show my home page" but leave its address empty. Otherwise firefox resets homepage address).
And with Firefox from tarball, everything still works well and the bug does not occur.