Page Up/Down keys do not work when document is opened in read-only mode.
Steps to Reproduce:
1. Open an presentation in read only mode (happens when you open it from browser or email client).
2. Try to navigate using Page up/down keys
When you switch to editing mode, it works as expected. Should work in read-only mode as well.
User Profile Reset: No
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:50.0) Gecko/20100101 Firefox/50.0
LibreOffice Version: 18.104.22.168 Build ID: 1:5.1.4-0ubuntu1
those keys are working correctly. Opened sample spreadsheet document from internet: https://community.tableau.com/docs/DOC-1236
*** This bug has been marked as a duplicate of bug 89688 ***