Bookmarks by the Side

The extension is found at the sidebar.
Do note to use this extension you need at least Opera Developer 29.0.

You can access the side via these shortcuts:
- For Windows [Opera menu → Extensions → Sidebar (Ctrl+⇧Shift+s)]
- For Mac [View → Show sidebar (⌘⇧s)]

Extension features:
- View bookmarks in a tree structure
- Manage bookmarks via drag and drop
- Right-click options to open folders and edit or delete bookmarks

Bookmarks by the Side is a fork of Neater Bookmarks by Evan Shultz.