Obsidian's Privacy Glasses plugin allows users to blur their notes and sidebars for added security. With this plugin, you can choose from various obfuscation options, including 'Solid Blocks' and 'Circles', to conceal your text. The plugin also features a settings dialog where you can adjust the blur level to suit your needs. Additionally, it supports live preview mode and has improved compatibility with different themes. Overall, Privacy Glasses provides an extra layer of protection for your sensitive notes.