Can more than 1 ver of FF be installed at the same time? I currently have FF 3.x installed, and want to migrate to the newest FF, but before I do, I need to see which of my add-ons are no longer needed due to new intrinsic FF features, and if other add-ons are compatible. I simply need to have the features of certain add-ons, and if the new FF does not have the features I need, and the add-ons that give me those features are not compatible with the new version, then I simply can't upgrade. At some point I will write a detailed document stating features that I believe should be built into FF, but until then, perhaps a new Mozilla Migration Wizard program should be created. It would be able to scan a person's current installation, add-ons and all, and provide a report on which add-ons are compatible with the version the person wishes to upgrade to, and which are not, and check online to see if updates for the incompatible add-ons are available. The Mozilla Migration Wizard should also tell the user which add-ons are obsolete because their functions are built into the newer version of FF. But back to the question at hand: Can more than 1 ver of FF be installed at the same time? If so, is there a special procedure to follow? Will trying to install a second version corrupt my currently installed version? I hope a dual installation is possible because it will help me to transition to the newest FF as smoothly as possible, and it may also provide me with insight to suggest new features, procedures, functionality, utility type programs, and such. Thank you for your time. I hope to hear from you soon. Gunther