When a PDF displays incorrectly, click on the 
Menu icon in the upper right corner of the browser and select "Options."
Scroll down to "Applications" and then to "Portable Document Format (PDF)" in the left column.
In the right column, click on the drop-down menu and select "Open in Firefox."
If you'd prefer to open the document in Adobe Reader -- rather than Firefox-- you may select that option under "Use Other."
