MuPDF was a full featured version of the super lightweight
mupdf viewer, which supported annotations and selecting text, mobile view.
After mupdf library was reported with 4 CVEs (3 of them regarding xps files and an integer overflow), upstream perhaps didn’t continue full version
mupdf. They rather continued / created a stripped down version called
mupdf viewer. It doesn’t have mobile view / text selection AFAIK.
Since the vulnerabilities appear to be due to underlying library, is it possible to build original
mupdf with new libs? bringing a PDF viewer with text selection and mobile view to fdroid.
In such a case,
full network access permission shall be removed, because simply it causes people stay away from the app.
pen&pdf by C Gogolin is only opensource pdf viewer that allows to select text and highlight / annotate. It is there on submission queue. Hope it too would be built without internet permissions if built – since those permissions are required for Google cloud print apis that we don’t use.