I am asking this question only because someone else asked it and I have solved the problem. I can't reply to them because this is a new account... I had the problem that the built-in pdf reader would always appear even after I installed and configured Foxit, and the built-in reader wasn't performing well during the "find" function (areas very far away from the actual found words were highlighted; very random and unhelpful). To fix the problem I did two things: 1) I disabled the built-in reader. I opened Options -->Applications and switched "Portable Document Format (PDF)" to "Use Foxit Reader Plugin..." Please note that on that tab you will most likely have several other "Content Types" shown that look like PDF things, but the ***key*** "Action" to change is the one associated with "Portable Document Format (PDF)". 2) In the "Add-ons Manager" under "Plugins" I changed "Foxit Reader Plugin" to "Always Activate". I also changed the "Adobe Acrobat" plugin (because I have both Acrobat Reader and Foxit installed) to "Never Activate".