Hi There,

I have an issue with Firefox 3.6 version. When Firefox launched for the first time it comes up with a Import Wizard. I have suppressed this with a override.ini file, placing this file in the same location as Firefox.exe. Immedialtely after this a window appears and prompts you set Firefox as the default browser each time it starts. I know this is somethting do with pref.js file gets created in appdatafolder. Since in a random profile the file gets created in runtime each time the profile name will be different hence i can not have the same folder structure in a MSI.

So far i have tried to keep the pref.js in c:\program files\mozilla firefox\defaules\profile folder.

Renamed and copy the file pref.js js to user.js in the above location but no luck.

anyone who has suppressed the above window?

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have you seen this addon https://addons.mozilla.org/en-US/firefox/addon/2553/

I used it recently and can recommend it to include in your firefox package to manage settings
Answered 06/28/2010 by: timmsie
Fourth Degree Brown Belt

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It's been a while since I did a Firefox for a client, but I seem to remember having an extracted Firefox installation directory (check Package KB for 2.x and 3.x for details).

You then make your modifications to the files in the installation source to disable/configure your options, using the various .js files etc and then snapshot the setup installation into an MSI.

The resulting MSI will have those configuration options set. You should then find that when you need to do the next version you can re-use the configuration files with your new extracted source.

Hope that points you in the right direction,


Answered 06/28/2010 by: dunnpy
Red Belt

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The following file entries turn off the default browser check and automatic updates:
pref("app.update.enabled", false);
pref("app.update.auto", false);
pref("browser.shell.checkDefaultBrowser", false);
pref("browser.search.update", false);
pref("extensions.update.enabled", false);

Check which options you wish to turn off before implementing...
Answered 06/28/2010 by: AB
Purple Belt

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Could save some time and just download the msi version from here:


Been using this for years now in our organization without any issues.
Answered 07/02/2010 by: joedown
Second Degree Brown Belt

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Answer this question or Comment on this question for clarity