帰ってきたDarkBlueテーマ(X) by 1llum1n4t1

A browser extension that converts X's (formerly Twitter) dark theme (Lights Out) into the classic DarkBlue (Dim) theme that was once available.

[Features]
- Automatically converts X's dark theme into the classic DarkBlue theme
- Toggle on/off with one click from the extension popup (default: ON)
- Safe design that does not affect light theme users
- Full support for SPA navigation and dynamic content
- Complete FOUC (Flash of Unstyled Content) prevention: dual defense via CSS + MAIN world setAttribute intercept eliminates dark theme flickering on page load

[DarkBlue Color Palette]
- Background (main): #15202B
- Background (card): #192734
- Background (hover): #22303C
- Border: #38444D
- Accent: #1D9BF0

[Requirements]
- Firefox 142 or later
- X's dark theme (Lights Out) must be enabled
- Does not apply when light theme is set

[Privacy]
This extension does not collect any personal information. No communication with external servers. All processing is performed entirely within the browser. See the privacy policy for details.

[Source Code]
https://github.com/1llum1n4t1s/DarkBlueThemeX

[License]
MIT License