Firefox: Disable automatic safe mode after crash

Question

How to prevent firefox showing the safe mode dialog after the crash? enter image description here

It blocks the automatic selenium tests.

score 14 · Accepted Answer · edited Apr 07 '16 at 12:35

I have no idea how you got this and what your testing flow is. So I can't reproduce and test the solution. But Firefox Safe Mode can be disabled by setting the key toolkit.startup.max_resumed_crashes in about:config to -1.

Here's how to start Firefox with that preference set in C# binding:

FirefoxProfile profile = new FirefoxProfile();
profile.SetPreference("toolkit.startup.max_resumed_crashes", "-1");

IWebDriver driver = new FirefoxDriver(profile);

mmm · Answer 2 · 2014-01-23T19:37:13.487

4

Since Firefox 23, you can also use the environment variable MOZ_DISABLE_AUTO_SAFE_MODE to disable this dialog and the automatic safe mode.

edited Jan 23 '14 at 19:37

answered Jan 23 '14 at 00:23

mmm

1,618
16
32

Thank you for the answer. It worked fine until recently. Can you reproduce this? – serv-inc Apr 07 '16 at 11:16
At least with Firefox Portable, this seems to have no effect. – Bowi Oct 30 '17 at 13:42

score 0 · Answer 3 · answered Jan 22 '14 at 15:58

0

Did you take a look at the configuration options in about:config, there are options for safebrowsing which might be useful.

answered Jan 22 '14 at 15:58

Bhaskar

554
2
10

score 0 · Answer 4 · answered Apr 07 '16 at 11:52

The solution by @mmm worked until the recent Tor Browser Bundle (which uses Firefox).

If you need an alternative, you can always delete the line

user_pref("toolkit.startup.recent_crashes", 4);

from prefs.js, for example like

sed -i '/toolkit\.startup\.recent_crashes/d' /path/to/prefs.js

or call this as

os.system("sed -i '/toolkit\.startup\.recent_crashes/d' " +
           os.path.join('/path/to' + 'prefs.js"))

Firefox: Disable automatic safe mode after crash

4 Answers4

Linked