You can't use two different versions, the newest will always dominate. If you do need 2 separate versions then you will require either a virtual pc setup, or a usb key (I prefer this) or other media. This happens with most applications on windows. I can do this on Linux buts its a different can of worms. Portable Firefox http://portablefirefox.mozdev.org/ can help you do this. HTH Clint. Peter Kaulback On 4/26/2010 1:28 AM, Clint Hamilton-PCWorks Admin wrote: > This is regarding and started with > //www.freelists.org/post/pcworks/How-do-you-go-back-to-a-previous-version-of-FireFox > > I installed http://www.mozbackup.org/ and did a backup of > everything in FF that it could. > > I found v3.5.2 at > http://www.oldversion.com/Mozilla-Firefox.html and I installed > it in a NEW FOLDER, separate from v3.6.3 so I could have both > installed. > > I clicked to start v3.5.2, and to my shock, all of the > extensions FROM v3.6.3 were already installed and setup! How > is that possible? The 'Real Player Browser Record' plugin was > back and working on v3.5.2, while it does show up at YouTube > for example, the YT jerks have found a way to still disable it! > But at least it will work at other websites. (With FF at YT > one will just have to use another plugin like > "VideoDownloader"). > > I closed v3.5.2 and opened 3.6.3, and both were still > installed, and working "independently" of each other, but I > don't know just how independently because of the extensions > mysteriously showing up installed and configured on v3.5.2. > Does the Mozilla installer look for setup files or Profile > folders from past installations and apply those to all > installs? (If so, shouldn't it ASK if that's what you want to > do?) So it seems all is ok. > > So I shut my PC down for the day, restarted it today, went to > start v3.5.2 and for some reason this time there was a box that > showed up saying something like or about "....checking add-on > compatibility....". I don't understand why that didn't happen > yesterday when I first loaded it. > > Then I started v3.6.3 and it also did the same thing! Also, it > somehow re-added 2 add-ons to the main browser bar at the top > that I had previously REMOVED. It also didn't go to my default > FF page, it went to that Mozilla page saying something like > "Welcome to FF 3.6.3". Well, that's what I have been running > for several weeks now! > > Each time I open 3.6.3, still after a wait of MINUTES (AFTER > FIRST opening 3.5.2), the "Add-ons" panel immediately opens up! > And it goes through that "....checking add-on > compatibility...." again! And it also says I have installed 3 > new extensions!! Oh really?? WHICH ONES??? It also keeps > RE-enabling one of the two I disabled! It also keeps going > back to the Mozilla default page saying I have 3.6.3 installed! > > If I open 3.6.3 again WITHOUT first opening 3.5.2, all is > normal! (Again, after a wait of 5+ minutes). Then if I go to > open 3.5.2, then it goes through all that BS again described > above with 3.6.3! If it open 3.5.2 again, it's normal! > > It would seem two versions of FF cannot exist on the same > PC. ?? If they can, how do I stop this intolerable behavior? > > Thanks, > -Clint > ========================= The list's FAQ's can be seen by sending an email to PCWorks-request@xxxxxxxxxxxxx with FAQ in the subject line. To unsubscribe, subscribe, set Digest or Vacation to on or off, go to //www.freelists.org/list/pcworks . You can also send an email to PCWorks-request@xxxxxxxxxxxxx with Unsubscribe in the subject line. Your member list settings can be found at //www.freelists.org/cgi-bin/lsg2.cgi/l=pcworks . Once logged in, you have access to numerous other email options. The list archives are located at //www.freelists.org/archives/pcworks/ . All email posted to the list will be placed there in the event anyone needs to look for previous posts. -zxdjhu-