How often does Firefox crash, and what are you doing when it crashes?

Have you tried running Firefox in its Safe Mode? That's a standard diagnostic tool to bypass interference by extensions (and some custom settings). More info: Diagnose Firefox issues using Troubleshoot Mode.

You can restart Firefox in Safe Mode using

Help > Restart with Add-ons Disabled

In the dialog, click "Start in Safe Mode" (not Reset)

Any difference?

The forum software detected your Firefox as version 10.0.2. Is that correct?

Version 10 is not secure; Mozilla discloses security flaws after each new release. Is something holding you back from upgrading to Firefox 27? Please let us know so we can suggest solutions or workarounds.

If Help > About Firefox shows Firefox 27.0.1, you may need to clear the preference that is misreporting your version number. See: How to reset the default user agent on Firefox.