10.5/10.6 transition which steps to take depending on what you have.

Question

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Many people are asking the question if whether to upgrade to 10.5 or 10.6. It really depends on your situation and what you can afford. This tip will help in that decision making, with various steps to prevent failure:
1. Regardless of which operating system you choose, making at least two backups that are separate from the computer is highly recommended.
2. Users with PowerPC Macs can only go up to 10.5.8, if they have at least 867 Mhz (1 Ghz and greater meet that criteria). Dual 800 Mhz do not. Third party software known as LeopardAssist may offer an unsupported means of getting 10.5.
3. 10.5 is no longer available for online order from Apple, but many online Apple stores have a phone number where you can special request it for an order.
Also many Mac used and refurbished shops may have it. Be sure the 10.5 disc you order is a black color with a pink nebula in the middle. Be sure it does not say Upgrade, DropIn, or OEM. If it has a Mac model number on it, it will not work with your Mac, if your Mac had worked with 10.4.11 or earlier.
4. You can jump from 10.4 to 10.6 if your Apple hardware and software support it. This user tip explains which Apple hardware do:
http://discussions.apple.com/thread.jspa?threadID=2126451
5. 10.5 does not give Boot Camp to those machines that don't support 10.6.
6. 10.5 limits your access to Classic, as explained in this user tip:
http://discussions.apple.com/thread.jspa?threadID=2176255&tstart=10
7. 10.5 has these hardware and software known to be compatible with it:
http://support.apple.com/kb/HT1370
Intel software, PowerPC software
8. 10.6 has this hardware known to be compatible with:
http://support.apple.com/kb/HT3669
and this software from links by
C!Net,
http://snowleopard.wikidot.com/
http://www.macintouch.com/specialreports/snowleopard/slcompat.html
9. Used and refurbished Macs can give you a transition until you can afford Snow Leopard, but remember, they have to come with their prebundled discs to ensure you don't miss out on whether or not they are ready for your upgrade needs.
Above all, if you don't see reference your inquiry here, be sure to ask in the appropriate forums on http://discussions.apple.com/ to determine which path gives you the least resistence.
Good luck!
This is the 1st version of this tip. It was submitted on December 23, 2010 by a brody.
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Answer 1

When you updates, how did you do it? Was it by downloading Firefox from getfirefox.com? Or using the internal updater to update Firefox?
I'd suggest doing the following:
First make sure Windows is all up to date.
Then, click on Help, and check for updates inside Firefox. Install any updates it finds (It might be Firefox 3.6.28, or Firefox 12)
After installing that update, repeat the Firefox check for updates. After you install a version higher than Firefox 4, you will have to click on About Firefox to check for updates.
If at any time during the update process, Firefox asks to update your add-ons, allow it.
Finally, once you have all your updates installed, go to your Addons manager and check for any updates.