Someone might write a farr plugin to search within a specific file or a very few number of specific files, but for general file contents searching you will need something that does detailed indexing of file contents.
Such indexing is a non-trivial load on your pc and occupies large amounts of drive space, so to do searching within all the files on your hard disk (or even a large collection of them), you really need a different kind of program, one that does very largescale indexing of file contents, like one of the
Desktop Searchers.
