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On Vista Firefox 6 incorrectly deals with security certificate problems

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After I installed Firefox 6, I tried to go to one of my web sites. I know that there is an https security certificate problem with this site when I go to https://staging.photoquestadventures.com rather than https://www.photoquestadventures.com. On XP, FF6 opens the site. on Win7, FF6 warns about a security certificate problem then allows me to create an exception and open the site. On Vista, it says that it can't find the server at www.staging.photoquestadventures.com and I cannot get past this point - only on VISTA!

After I installed Firefox 6, I tried to go to one of my web sites. I know that there is an https security certificate problem with this site when I go to https://staging.photoquestadventures.com rather than https://www.photoquestadventures.com. On XP, FF6 opens the site. on Win7, FF6 warns about a security certificate problem then allows me to create an exception and open the site. On Vista, it says that it can't find the server at www.staging.photoquestadventures.com and I cannot get past this point - only on VISTA!

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Clear the cache and the cookies from sites that cause problems.

"Clear the Cache":

  • Tools > Options > Advanced > Network > Offline Storage (Cache): "Clear Now"

"Remove Cookies" from sites causing problems:

  • Tools > Options > Privacy > Cookies: "Show Cookies"

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I downgraded to Firefox V4 (I didn't have a copy of V5 stored and couldn't find it on the net) and it asked the correct question: to allow connection even though there was a security certificate problem. Then I upgraded to V6, and it continued to connect just fine. So something in the V5 to V6 upgrade created the problem for me.

I wonder if there is insufficient testing of Firefox on Vista, as I have had several problems with new versions while I have not had the problems on XP or Win7.