When using the back and forward buttons, the edited content is lost in "edit source" mode.
The bfcache (back/forward cache) seems to be broken again. These buttons are supposed to allow us to see the pages how they were when we last saw them. EDIT: this part is working again (26 May 2016) on Firefox and Chrome.
The undo/redo edit history is obviously lost too (on all three browsers).
Browser: Firefox 47.0 64 bits, Chrome 51.0.2704.84 m, Internet Explorer 11
OS: Windows 7 64 bits
Example edit: https://en.wikipedia.org/w/index.php?title=Air&action=edit
Steps to reproduce:
- Enter some text in the main edit box
- Preview the changes
- Go back to the previous page
- Try to undo/redo all/part of the edit with ctrl+z and ctrl+y
The changes are undone step by step on each ctrl+z press and redone with ctrl+y
Tested with and without the "enhanced editing toolbar".