Rated 3 out of 5 stars
The "Open PDF"-feature of this add-on doesn't work anymore for FF18 on XP Home SP3.
Instead, clicking that button will lead only to an empty new tab.
Please have a look at this issue!
In case you want to reproduce it:
I 've set the current "SumatraPDF" to be my default PDF reader in FF18.
I did that in the settings of this add-on.
In the "Applications" section of the FF settings, I've set "Adobe Acrobat Documents" to "Always ask".
My default PDF reader for the whole system is still the "Adobe Reader".
These are the settings that used to work fine before FF18 was released.