If you are reading a long document, and save it either explicitly or view an autosave, the view will jump to where the cursor is. If this is a different page then this is very disruptive.
This seems different to similar issues reported elsewhere as there is no TOC, index or tables in the document I'm editing, and it happens regardless of where the cursor is (body text, bulleted list, footnote, etc).
Steps to Reproduce:
1. Load or create a document with sufficient length that it is not all visible in a single view.
2. Place the cursor anywhere.
3. Scroll the view so that the cursor is towards the edge of the view or outside the view.
4. Either save the document or wait for autosave.
The view jumps to the cursor location.
The view does not change.
User Profile Reset: No
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:54.0) Gecko/20100101 Firefox/54.0
This was corrected for the 5.2/5.3 builds as noted bug 85797, please update to a more current release and retest.
*** This bug has been marked as a duplicate of bug 95797 ***