Is the feature relevant to the Firefox PDF Viewer?
No
Feature description
Something like this:
A. Auto-save / checkpoints
Example:
VS Code has a concept called “working copy backups”:
Every open file/editor has a working copy in memory.
Changes are periodically flushed to a hidden backup folder (.vscode/backups or OS-specific temp directory).
This happens in the background without overwriting the original file immediately.
If the system crashes or VS Code closes unexpectedly, the editor can restore from these backups.
Other PDF viewers
No response