I use Firefox as my default browser, but I also use Chrome quite a lot (and IE only for those few sites that insist on it). This morning my PC crashed. When it recovered, all my Chrome bookmarks had vanished - many of them marking sites from which I planned to download files. The backup bookmarks file (.bak) was also empty and therefore useless.
When I went to the Chrome help page for a clue on how to recover the bookmarks, I found that this problem has been repeatedly reported by users for more than a year, but Google appears to have done nothing about it. Their corporate motto may be "Don't do evil", but it seems there is a coda to that: "... or much good either." Maybe I should stick to Firefox in future.