Firefox Default Choose Firefox to be my default browser, but vista keeps opening internet explorer, I don't get it? Any solutions for this problem?

a default browser is the browser that you use all the time
if you click on internet explorer and like how it works at it is the browser that always starts then that is the default browser
if you open in internet explorer and search for another browser say google and you then click on google it will suggest that you make it your default browser and if you click on yes then every time you open the system google will appear on the scree as the browser
now if you open on google and search for another browser say firefox again it will say do you want firefox to be your default browser and if you click yes , then each time you open the pc it will open in firefox
browser is a search engine for the net and all those I have mention become default browser when you click on the yes
as to what is your default browser no one knows as you open the pc and read it every time

Depends on what browser you're using, since theres a lot, its hard to answer your question, try looking under settings in your browser.

Google is a search engine not a browser.
You can run any browser such as Internet Explorer or Mozilla Firefox and get them to default to Google as the default search engine or you can save Google as a Favourite in IE or a Bookmark in Firefox.

To set Google as the default home page in IE.
Open Internet Explorer then enter www.google.com when Google page opens then Click on Tools - Internet Options
In the General tab click Use current.
Now when you open IE then Google automatically opens.

To set Google as the default home page in Firefox.
Open Firefox then enter www.google.com when Google page opens then Click on Tools - Options
In the General tab click Use current pages.
Now when you open Firefox then Google automatically opens.

If you are using any other browsers then setting up Google as the default page is configures in a similar method.

1.Open Internet Explorer by clicking the Start button , and then clicking Internet Explorer.
2.If a message is displayed asking if you want Internet Explorer to be your default browser, click Yes. That's all you need to do.
If a message does not appear, go to the next step
3.Click the Tools button, and then click Internet Options.
4.Click the Programs tab, and then click Make default.
5.Click OK, and then close Internet Explorer.
Internet Explorer is now the default web browser

you mean, how to restablish explorer as the default browser? if that is waht you asked, then the solution is this:

1. go to control panel
2. double click on internet options, or internet settings
3. click on progrmas tab
4. then where says internet explorer is not the default browser, click on default or predetermine

It is pretty easy to set Firefox as your default. First click on Tools, then click Options. If you don't see the top menu, hit the ALT key on your keyboard. Once you are in the options screen, click on Advanced. There should be a "System Defaults" section on the lower part of the menu. Click on Check Now and it should let you pick Firefox as your default browser.

If you have older browsers like Internet Explorer 6 or 7 - they will quite often show errors while opening. You can try to upgrade to Internet Explorer 8 (for Windows XP) or Internet Explorer 9 (Windows Vista and Windows 7).
Opera browser strictly follow standards and sometimes doesn't support non-standard web applications.
Therefore I would recommend to use either Google Chrome or Firefox 4 as your default browser. As for the above mentioned browsers - Opera and Internet Explorer there are no easy solutions for now.

Fix 1: Start by Resetting Your Default Browser Most times, I can fix my Outlook hyperlink problem by resetting my default browser to Internet Explorer. I start with this step even if I plan to use Firefox as my browser. The reason I choose this path is I’ve had better success and it takes me closer to my end goal.
To make IE your default browser,
1. Open Internet Explorer
2. Click Tools from the menu
3. Select Internet Options.
4. Click the Programs tab
5. Click the button labeled Make Default.
6. Click OK.
7. Test a hyperlink in Outlook to see if the web page opens in Internet Explorer.
Fix 2: Reregister Windows DLL Files Even after resetting your default browser you still can’t open hyperlink in Outlook, it could be one or more registry keys is damaged. The solution is to reregister some of your DLL files. The process may sound intimidating, but it’s easy. There are 6 files to register based on your system. Some configurations use shdocvw.dll and others use shdoc401.dll.
To reregister the DLL files,
1. Close all open programs.
2. Click the Start button.
3. Select the Run… command. Vista users can type “run” in the Start Search textbox.
4. In the Open: textbox, type regsvr32 followed by a space and the file name.
In the screen snap below, I’ve used the first file Shdocvw.dll.

5. Click the OK button. You should see a message showing the process succeeded.
6. Click OK to dismiss the message.
7. Repeat the procedure for the other DLL files.

• regsvr32 Shdocvw.dll (Some system use Shdoc401.dll instead)
• regsvr32 Oleaut32.dll
• regsvr32 Actxprxy.dll
• regsvr32 Mshtml.dll
• regsvr32 Urlmon.dll
• regsvr32 Shell32.dll

8. As before, test to see if your Outlook hyperlink problem has been resolved.
Fix 3: Reset the (NONE) URL File Types If you’ve gotten to this part, I have to figure your Outlook hyperlinks are still broken. Don’t fret as I have another fix to try. My guess is someplace along the line your file associations broke. This is the mapping Windows uses to a file type to program. A common mapping might be .XLS files with Microsoft Excel. In this case, we need to check URL mappings.
To set URL file associations,
1. Open My Computer.
2. From the Tools menu, select Folder Options…
3. Click the File Types tab. A long list of Extensions and File Types appears.
4. Scroll down till you get to (NONE) URL:HyperText Transfer Protocol

5. Click the Advanced button.

6. Select the bold open item. *
7. Click Edit…
8. Click the Browse… button
9. Navigate to where Internet Explorer is located. (For most PC, it’s at C:\Program Files\Internet Explorer\iexplore.exe)
10. Add a space and %1 to the end of the file name. (e.g. "C:\Program Files\Internet Explorer\iexplore.exe" %1)
11. Click OK.
12. Click Close.
13. Repeat the process for (NONE) URL:HyperText Transfer Protocol with Privacy.
* If open doesn’t show, click New and type open in the action box.
Back to Firefox (Optional) Once you get the Outlook links to open in Internet Explorer, you can change your default browser to Firefox. This should roll down to Outlook so any embedded hyperlinks will open in the correct browser.
To set Firefox 3 as your default browser,
1. Open Firefox
2. Select Tools from the menu
3. Select Options…
4. Click Advanced
5. Click the Check Now button
6. Click Yes if the default browser is not set.
7. Click OK.

you go under file import and you have internet explorer options which gets imported to firefox and set firefox as your default browser under tools/options/advanced/general/system defaults and make it your default browser