Opera is installed by Adobe as part of the Creative Suite.
Turns out Adobe has been using Opera for years as a rendering engine. I’ve read that it’s used in all kinds of places: to display Adobe Help files, in Device Central (to preview how applications would look in different mobile devices), in Photoshop, in Bridge, and in Dreamweaver (which has apparently been using Opera since Macromedia days). I’m sure this is only a partial list.
With a little digging, I found the hidden Opera installation in the bundled contents of Adobe Bridge (you need to view the application’s package contents to peer inside).
I discovered Opera was on my system when opening a torrent. Expecting Transmission to open up, I was surprised to see an Opera browser window. This, it turns out, is a common occurrence. If you run in to this, the easy solution is to right click the .torrent file, choose ‘Get Info,’ and then choose Transmission. Then choose ‘Change All’ so that all future torrent files will open with Transmission.
While I was a bit annoyed to see a browser I never installed on my machine, I’m not going to do anything about it since it’s needed by my Adobe apps. But it should stay there, behind the scenes. I think I know how this happened. I recently reinstalled Mac OS X and reinstalled all of my applications. I installed the Adobe Creative Suite, and I later installed Transmission. When I opened a torrent link, the Mac OS had was still associating all .torrent files with Opera, as that was (prior to installing Transmission) the only application on my system that would accept this file type. That explains why I had to re-associate the file type. So the real problem here is that the Mac OS associated a file type with an application that is hidden inside a bundle. That seems like odd behavior to me.
And since I’m talking about Adobe applications, I can’t pass up the chance to rant about Dvorak-Qwerty. All Adobe apps that were once Macromedia apps (Dreamweaver, Flash, Fireworks) function as expected with the Dvorak-Qwerty keyboard layout. All other Adobe apps do not support the D-Q layout.
This drives me crazy. We’re now on the fourth iteration of the Creative Suites, and this inconsistency persists. Guess it’s time to send Adobe another message.