Beepbox Extension, developed by MartSnack, is a free Chrome add-on that brings small quality-of-life changes to the popular music composition tool, Beepbox. With this extension, users can now easily insert and delete columns in their compositions by simply pressing the designated buttons.

One of the standout features of Beepbox Extension is its undo functionality, allowing users to easily revert any accidental insertions or deletions. If you mistakenly delete a channel or add one too many, simply press "z" to undo the action and restore your composition to its previous state. In case of any glitches, pressing "z" will also help recover your composition.

While Beepbox Extension greatly enhances the user experience, there are a few known issues and bugs. For instance, if you have less than 16 bars and toggle to delete mode, an extra button may appear, potentially shuffling your patterns. However, this can be undone. Additionally, undoing an action may not update the button header, but toggling the buttons from one mode to the other will fix this issue.

Overall, Beepbox Extension is a valuable addition to Beepbox, providing users with convenient options for inserting and deleting columns in their compositions. It is important to note that if you encounter any issues while using the extension, such as website crashes, it is recommended to contact the developer for assistance.