How can a keyword search be performed when viewing pdf files/pages in Firefox mobile on my iPhone? “Find in page” from the drop-down tab is not an option when viewing pdf files/pages and the option is only visible when highlighting sections of the pdf and the option pops up from the highlighted section with other options. However the “Find in page” option that does pop up from the highlighted section of the pdf has always been dead or useless; in other words it doesn’t work and fails to search for any keywords.

Please help!