Rated 4 out of 5 stars
Please accept my English reply.
Regarding your first point (length of capture is limited), the image dimension is limited to a little more than 30,000 pixels and this is caused by a limitation in Firefox's canvas-based image capture mechanism. It is not something that we can easily fix.
Your second point is a request for a visual (not just audio) indication that a page was successfully captured and saved, This is something we will consider adding to a future version of Page Saver. An error is always displayed if a capture fails.