Upon the first run, without warning, I see this: "If you read this, all of your cookies that are not currently in use just self-destructed. Don't panic. You can undo this if you prefer to keep them for now."
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"Undeletes happen in batches. If you had a lot of cookies, you might need to restore more batches. Click SDC's icon again. Select Undelete (more) cookies from the menu. Repeat this until you get a notification stating that No more undeletes are possible."
Couldn't the extension have simply asked me once before proceeding with the delete in the first run? Basic usability.
Funny you mention it as basic usability. The story on the home page with most points is about usability and they explicitly recommend using undos instead of confirmations: http://goodui.org/#8
They recommend doing that when the user "presses an action button or link". This is not the same as launching a browser extension.
Blindly following some person's recommendations doesn't even close to having good UI (or UX). eg. Opting for no confirmation and providing an undo option is an absolutely terrible idea for a 'format disk' button in an OS installer.
Undo instead of confirmation would be a better approach when most users would want to take the action. Here is it not established yet that the default to clear all the cookies is the acceptable choice for most users.
Upon the first run, without warning, I see this: "If you read this, all of your cookies that are not currently in use just self-destructed. Don't panic. You can undo this if you prefer to keep them for now." . . . "Undeletes happen in batches. If you had a lot of cookies, you might need to restore more batches. Click SDC's icon again. Select Undelete (more) cookies from the menu. Repeat this until you get a notification stating that No more undeletes are possible."
Couldn't the extension have simply asked me once before proceeding with the delete in the first run? Basic usability.