Discord User/Channel/Message ID ExTractor tool от chick

Once you install this extension in Firefox, you will see three buttons in the lower-left corner when you access Discord. The green button shows the user ID, the yellow button shows the channel ID, and the blue button shows the message ID. Each button has basic functions like copy, clear, and save to file.

The message ID add-on allows you to choose whether to display the ID as a message URL or as the raw message ID.

To use the add-on, install it and then click one of the buttons in the lower-left corner to open the ID container. Click "Start" to begin collecting IDs, and then scroll through the members, channels, or messages. The more you scroll, the more IDs you will gather!

The channel ID add-on can also be used to collect IDs for group DMs, among other things.