Hello,

The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information.
Note: This will cause you to lose any Extensions, Open websites, and some Preferences.

To Reset Firefox do the following:

1. Go to Firefox > Help > Troubleshooting Information.
2. Click the "Reset Firefox" button.
3. Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish.
4. Firefox will open with all factory defaults applied.

Further information can be found in the Refresh Firefox - reset add-ons and settings article.

Did this fix your problems? Please report back to us!

Thank you.

Resetting the Browser to factory defaults did not fix the problem. Thanks for your attention.

Firefox has just installed a full version of an update (about 30 Mb). The browser is now behaving correctly. Thanks for the update.

Looks that they skipped the 25 beta 5 release (it went from b4 to b6), probably due to the summit this last weekend.

• http://hg.mozilla.org/releases/mozilla-beta/summary

The Firefox update worked for about 5 minutes then crashed. When it resumed the update had vanished and the problem returned. Firefox again tried to update, failed and my computer crashed.

The following message appeared - Update Failed

The update could not be installed (Patch apply failed)

Try to install the full version of the current beta and do a clean install (i.e. delete the Firefox beta program folder).

You can find the full version of the latest Firefox 25.0 beta release in all languages and for all Operating Systems here:

• http://www.mozilla.org/en-US/firefox/all-beta.html