As stated before, the issue is command F is using Safari, as opposed to Adobe Reader "find" within Safari. It's been this way for years, downloading PDF's just to search them, and this morning I had enough, so here we go ...
1. Open any pdf outside of Safari.
2. Hover over empty toolbar space > control + click > edit > find. This will place the magnifying glass find button on your toolbar permanently.
Apparently Adobe 9 had the find button, and if/when we upgraded to Adobe 10 (aka Adobe X) Adobe decided to remove the find button from the toolbar because ??? ... genius move, right? Clearly you can skip this step if you already have a find button on your toolbar.
3. Now in Adobe go to edit > preferences > internet > and untick "Display in Read Mode by default".
Steps 2 and 3 above should only need to be done once, and will work thereafter unless you start fiddling with Adobe again on your own or through update.
4. Restart Safari, navigate to a PDF document and open it in the browser. You should see your toolbar, whereas before you would not. If you don't like your toolbar there, just go back to step 2 and reverse. Then you can bring up your toolbar when needed by hovering over the lower portion of an open PDF and clicking on the Adobe squiggly trademark (looks like a triangle in cursive?). Not sure why anyone would want to do this, but the option is there. I like my toolbar there 24/7, but depending on the answer to my inquiry below, that might change ...
QUESTION:
So now when I open a PDF in Safari and want to search it WITHOUT downloading it, I click the magnifying glass and search away. But what about searching with Command F? It still defaults to Safari's "find", not Adobe's "find".
Anyone know how to make Command F search an Adobe PDF opened within the Safari Browser?
Also, here is a link that helped me figure this all out - http://www.wyonewspapers.org/acrobat.html