If you could open Firefox I would suggest you try disabling flash player as that may be involved in the crashes you have crash IDs for. Presumably you have read firefox crashes. As firefox will not run in safe mode the only alternative (unless it is a profile problem) is to

• try a clean install, involving deletion of the Firefox program files
  but NOT the firefox profile
  • follow instructions from http://kb.mozillazine.org/Standard_diagnostic_%28Firefox%29#Clean_reinstall

You mention rebooting, may I ask (do NOT try) have you tried any Windows System Restores? before or after these problems occurred.
I ask because Firefox is often damaged by Windows System restores. (Bug702045)

Your crash reports etc:

• Crash ID: 7ec1003d-5076-493a-a8bd-9c8ec2111030
  • Crash signature:
    hang | mozilla::plugins::PPluginInstanceParent::CallNPP_HandleEvent(mozilla::plugins::NPRemoteEvent const&, short*)
  • Related bugs include
    688992 UNCONFIRMED Browser hangup and Flash plugin crash
• CrashID: 1686b017-6899-4a2b-a932-116302111029
• and Crash ID: c96e1efb-af31-4fd9-95b8-9ac592111030
  • Crash signature: hang | NtUserWaitMessage | DialogBox2
  • related bug:
    Bug 591620 - [adbe 2850048] Flash crash/hang in [@ hang | NtUserWaitMessage | DialogBox2 ] [@ hang | NtUserWaitMessage | NtUserWaitMessage | DialogBox2 ]

No I hadn't done a windows restore in a couple of months at least.

Anyhow, I hadn't done anything else since my first post, and then Firefox just suddenly opened up. So I went to my add-on's and updated all of them, the major two were java and flash. Whether or not this helped I don't know, it seems fine for the moment.

Over and out!

Coo_ookie

Glad it works again, thanks for posting back.

Updating plugins is always advised. It is one of the tips in the firefox crashes article. It is also worth killing firefox.exe & plugincontainer.exe as advised in firefox hangs & firefox is already running but is not responding but that is not usually necessary if you have been resorting to rebooting the computer.