iPhone, iPod Touch, iPad
Sometimes, yes.
Install the "Add-on Compatibility Reporter" extension, and you can install extensions that have not been upgraded yet. Zindus works for me this way. (I haven't tried Virtual Identity.) EDIT: For Zindus, the version you…
You can build your own custom Linux distribution, run it in your browser, and share it with others using http://susestudio.com/ — it might not be what you're thinking of (as it's only a few years old, not 10 years), but…
iPhone, iPod Touch, iPad
Sometimes, yes.
Install the "Add-on Compatibility Reporter" extension, and you can install extensions that have not been upgraded yet. Zindus works for me this way. (I haven't tried Virtual Identity.) EDIT: For Zindus, the version you…
You can build your own custom Linux distribution, run it in your browser, and share it with others using http://susestudio.com/ — it might not be what you're thinking of (as it's only a few years old, not 10 years), but…