Updated the extension version to 1.0.1.

This release keeps the extension name as SA_agent and includes compatibility packaging for Firefox.

Initial Firefox release of SA_agent.

Features:
- Adds journal ranking badges to Google Scholar results.
- Provides AI-powered paper summaries from Google Scholar result text and accessible article text.
- Supports SA_agent numbered-account extension tokens from jpfchang.org.
- Shows credit usage and remaining balance for AI summary requests.
- Supports Firefox and Firefox for Android.

Note: The Firefox package does not bundle PDF.js extraction in order to comply cleanly with Mozilla validation.