Link Sidebar

## Description
Keep related links handy in a side panel with quick search, saved pages, and smart preloading.

### Detailed Description
Link Sidebar automatically organizes links from your browsing session into a hierarchical tree structure in the side panel. This helps you quickly find and revisit pages, especially when you're doing research or navigating complex websites.

**Key Features:**

* **Automatic Organization:** Automatically creates a "site -> page" tree structure for each tab based on URL normalization and similarity.
* **Fast Search and Filtering:** Instantly search by title, URL, or labels. Filter by site, patterns, and more.
* **Favorites and Labels:** Pin important nodes to keep them across sessions, add labels for better organization, and manually reorder items.
* **Keyword Tabs:** Create tabs for your favorite keywords to instantly filter the tree and highlight the same terms on the page.
* **Smart Preloading:** Preloads linked pages that match your registered keywords for a faster browsing experience.
* **Keyword Management:** Easily add and remove preload and exclude keywords from the sidebar or the settings page.
* **Accessibility:** Full keyboard support, focus management, and ARIA attributes.
* **Localization:** Available in English and Japanese.
* **Customizable Settings:** Customize thresholds, keywords, whitelists, and more from the options page.