(oops. looks like I should have really replied to Mele.)
Since when couldn't you use 6 in Mozilla?
I can, I have & have had it.
There have been times when Mozilla has blocked either extensions/plugins outright, or for particular version that have known vulnerabilities.
So yes, they may very well block Java 1.7u01 to 1.7u06, forcing you to go to 1.7u07.
Actually they
do something just like that.
- <pluginItem blockID="p119">
<match name="name" exp="Java\(TM\) Plug-in 1\.(6\.0_(\d|[0-2]\d?|3[0-2])|7\.0(_0?([1-4]))?)([^\d\._]|$)" />
<match name="filename" exp="libnpjp2\.so" />
<versionRange severity="1" />
</pluginItem>
- <pluginItem blockID="p125">
<match name="name" exp="Java\(TM\) Platform SE ((6( U(\d|([0-2]\d)|3[0-2]))?)|(7(\sU[0-4])?))(\s[^\d\._U]|$)" />
<match name="filename" exp="npjp2\.dll" />
<versionRange severity="1" />
</pluginItem>
If I had a problem with that, & the stupidity to do so, I could work around it.