4.3.0

Release date: 2026-05-03

Added Auto-refresh
- Refreshes every 500ms when the file in the main window changes.
- Disabled by default; can be configured in Settings > Advanced.
Added New Languages
- Vietnamese, Indonesian, and Arabic.
- Added translations for the plugin installation process.
UI Improvements
- Fixed context menu styling.
- New Help interface (Tray Icon - About - Help). If you still don't know how to use Seer after all this time, please open Help immediately!!!
Optimized "Run at Startup"
- If issues occur, please disable "Run as Administrator" in Seer's settings.
Fixed an issue where the Spacebar might not respond after File Explorer hangs.
Fixed an issue where Double-click to open with default program was ineffective for some built-in types.
Dozens of bug fixes and improvements (Comprehensively reviewed by AI).
Upgraded crash capture support.
Desktop Version: Checks license activation to return errors earlier.
- Thanks for your support! All activation fees are being turned into burning tokens.

Fixed an issue where a plugin loading failure could prevent subsequent plugins from loading, potentially leading to data loss when saving settings.
Plugins are now loaded only when their corresponding extensions are triggered, reducing startup time and memory usage.

Added font property information.
Added Save as SVG.
Added a button in the top-right corner to expand/collapse property information (state is saved locally).
Added Graph Inspector.
https://github.com/ccseer/FontViewer

Updated OIT support.
Attempted to fix the issue where OIT tries to connect to a printer by default.
Fixed an issue where Ctrl+W and Esc could not close the window.
https://github.com/ccseer/OfficeViewer

Updated libf3d support.
Added XYZ axis display.
Added more sidebar controls.
Added local configuration to save preview states (e.g., sidebar visibility).
Fixed an issue where files with Chinese characters in the name could not be displayed.
UI adjustments.
Added more flexible command-line argument control.
- https://github.com/f3d-app/f3d/blob/master/doc/libf3d/03-OPTIONS.md
- Example: --render.show_edges 1
https://github.com/ccseer/f3dviewer

Speed Improvements: Previewing the C:/Windows/WinSxS folder is now ~25% faster (reduced from 1700ms to 1300ms).
Task Management: Background tasks exit immediately when the window is closed instead of waiting for natural completion.
In horizontal view: Left-clicking blank space clears selection; Right-click is ignored.

Upgraded MDK support.
Reduced potential crashes; the "Allow renaming during preview" option in settings can now be safely enabled.
Added more context menu options.

Improved loading speed for subsequent preview pages.
Markdown Refactor: New loading logic reduces lag, especially for large files.
Upgraded support for Markdown plugins and updated default styles.
Added support for Mermaid.
Added support for TOC (Table of Contents via context menu or shortcut T).
Supports superscript, subscript, and highlighting (==text==).
Added support for GFM syntax (strikethrough, tables, task lists).
Bundled KaTeX font library for offline use and improved speed.

Improved text encoding detection accuracy.
Handled extreme cases for very large files (fixed scrolling issues for files exceeding 100M lines).
Load Speed Optimizations:
- Regular large file load (1000MB UTF-16LE): 5.47M lines, preprocessing time reduced from 1496ms to 658ms.
- Ultra-long lines and ultra-many lines maintained at previous levels, near hardware IO limits.
Added loading progress in the control bar for small file loading.
Optimization for small files (default threshold 3MB):
- Regular load (2.9MB UTF-8): Time reduced from 2760ms to 500ms (81.9% reduction).
- Ultra-long line rendering (2.9MB GBK): Time reduced from 11263ms to 2744ms (75.6% reduction).
- Ultra-many line rendering (2.9MB UTF-16): Time reduced from 14760ms to 1762ms (88.1% reduction).
- Note: "Time" refers to the duration from reading to full display (actual perception is faster as content renders progressively).