Chrome extension that opens each URL in list into tabs in a window, but only if prior pages have finished loading.
See Releases for most recent in-production changes. For old unsupported Chromebooks with old Chrome versions, it might still be possible to run this extension, check this release.
Chrome web store page for this extension.
Edge Add-ons page for this extension.
Future Feature: I've been asked to add the ability to open bookmark folders with this extension. This feature would allow you to right click a bookmark folder, select from "Open all sequentially (shallow)" and "Open all sequentially (deep)" in the context menu, and the tool would open and immediately begin opening the URLs of those bookmarks. I will add this feature once the Menu ContextType 'bookmark' is added to Chrome's API.