Yes, point? Are you talking about whether most people know something is libre or not? That's irrelevant. Most people are lucky if they can successfully turn their computers on. Netscape/Firefox went from nothing to the second most popular browser by opening the code.
You said this:
I like Opera, and use it on occasion, but my biggest problem with it is its closed code. If they opened the code, I think you'd see its popularity increase.
And that's what I was responding to, so yes, it's relevant.
Personally I think the reason why Firefox went from nothing to the second most popular browser was because Netscape screwed up badly (AOL's purchase of Netscape might have something to do with it, as pretty much anything that AOL touches turns to dust) and open-sourced the Netscape code because they gave up. Therefore instead of a company trying to turn a profit out of something that there's little to profit from, people doing it for free out of their own desire to build a suitable alternative to IE did a better job.
Microsoft would have died as well if IE was their only/mainstay product.
I think Firefox succeeded due to a timeline of events (and it was free):
1 - Some people wanted an alternative to IE, mostly techie-types.
2 - Firefox caught the media's attention, it did what it said it would, and a further reason to adopt it was that it wasn't vulnerable to the onslaught of malware/adware/toolbars affecting IE.
The second point doesn't really apply any more today, because of Firefox's popularity it is as much of a target as IE.
If Opera went open-source, it would have zero effect on its popularity. Come to think of it, I think a major reason for Chrome's popularity is similar to IE's desktop bundling - having Google Chrome on the front page of Google's web site. Google don't have a reputation for crapware, and their bit on the front page simply says "a faster way to browse the web".