I am now very dependent of OneTab. It saves so much RAM and organizes all my open tabs nicely. To my horror this morning all my saved tabs were gone. After hours searching for a solution I find here in the reviews that the solution is to disable and re-enable the plugin to make it come back with all saved tabs. I will give 5 stars if this marvelous plugin could make automatic backup copies of all saved tabs in a simple, plain .html file that is available immediately in case of some failure either from the browser or the extension.