Firefox 3.6.15 does not load, if automatic upgrade or issues an error message if installed by hand.
I allowed Firefox 3.6.15 to update my existing Firefox (3.6.13). After the upgrade, Firefox does not load (not in Task Manager). I removed it, downloaded and installed it by hand, and I get a 1.9.15 not compatible with 1.9.13 error message. When I reinstall Firefox 3.6.13, it works fine.
I allowed Firefox 3.6.15 to update my existing Firefox (3.6.13). After the upgrade, Firefox does not load (not in Task Manager). I removed it, downloaded and installed it by hand, and I get a 1.9.15 not compatible with 1.9.13 error message. When I reinstall Firefox 3.6.13, it works fine.