"Downgrading" Firefox..

Why is it you want to install Firefox 1.5? This is not a very wise choice as it no longer (for about a year now) receives any security updates, extensions won't work for it etc.

I prefer the tab system of 1.5, I prefer that in 1.5 I can have pages that would normally open in a new tab open in the tab its being viewed in instead, but in Firefox 3 my only 2 options are new tab or new window. Also Firefox 3 is making me want to go back to Vista. When I try to right click I never know what it is going to do, sometimes it bookmarks, sometimes it opens in a new window, sometimes it tries save the link, and sometimes it does what I want it to and display my options. I would have normally thought that was a mouse issue but it only happens in Firefox.

If there is a plugin or somewhere in the settings of Firefox 2 where I can make it tab like Firefox 1.5 (Where is will display up to 40 tabs in one browser page before the scroll bar comes up) then I am ok with Firefox 2.

> I can have pages that would normally open in a new tab open in the tab its being viewed in instead
1) If you click normally (Left mouse button) on a link it will open it in the window you are viewing.

2) A new tab opens when the html code of the website has this bit: target="_blank"
So in short, it's not Firefox's fault, it's the website coder :)

3) You also have an option in Edit > Preferences > Tabs > "When I open a link in a new tab, switch to it immediately"
Check that option, it will open the new tab and focus on it.

4) It's a security-related feature, not a problem. A lot of websites mislead you trying to steal information from your previous history or previously viewed website

If you still wish to do this:
https://addons.mozilla.org/en-US/firefox/addon/1122

Check "open links with a target attribute in current tab"
https://addons.mozilla.org/en-US/firefox/images/p/4310/943948800

Thanks for that. That fixes the issue I had when opening tags, but can anyone explain the right clicking issue I am having while browsing in Firefox?

"When I try to right click I never know what it is going to do, sometimes it bookmarks, sometimes it opens in a new window, sometimes it tries save the link, shows target properties. and sometimes it does what I want it to and display my options. I would have normally thought that was a mouse sensitivity issue but it only happens in Firefox."

Um.. I don't have such an issue.
Where are you right-clicking exactly? Give me a real live example.
On a link? What site?

I would assume that something is wrong with the following:
a) the keyboard - you might have pressed keys that are stuck on the keyboard, try cleaning it. The mouse could be dirty as well (?)
b) wires of the mouse and/or the keyboard
c) the USB or PS/2 jack is faulty? Try putting the mouse in another jack if it's USB. (I surely hope you're not using 4-devices-in-1 USB adaptors)
d) the driver of the usb mouse is malfunctioning?
e) the power supply? (a bit far-fetched, but you never know)

I appreciate the help, but I decided to go back to Windows(not due to this issue). I have a Verizon USB broadband modem thats not supported in Linux and I need to use it for work. Thanks for trying to help me though

You could always buy a router/dsl modem.. they're at least supported on all operating systems, provided your ethernet works properly. :)

I have a router and cable modem at the home and (2)T-1's at the office but there are times when I need internet when I am on the road which is why I need to be able to use the broadband card.

ah, bummer - have fun then, hope to see you using Ubuntu again soon!