This is a weird one. If you use an AutoConfig file to set the default new tab page and start opening new tab pages, occasionally it simply doesn't work. I'm going to provide a recreation scenario that doesn't use AutoConfig simply because it is easier. Create a file in: browser\defaults\preferences\ Called prefs.js that contains pref("browser.newtab.url", "http://example.com"); Start the browser. Hit Ctrl+T a few times. Notice that about:newtab pages are intermingled with your new tab page. On Nightly, the problem is a little different but still happens. If you look at the title of the new tabs, sometimes it's the web page, sometimes it is "New Tab".
Can't set new tab via preferene anymore.
Status: NEW → RESOLVED
Last Resolved: 2 years ago
Resolution: --- → WONTFIX
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