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OLLAMA_POPUP_FIX.md

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Ollama 403 Fix: Popup Window Architecture

The Problem

  • GET /api/tags from background script: 200 ✓
  • POST /api/chat from background script: 403 ✗
  • POST /api/chat from curl: 200 ✓

Root Cause: Thunderbird background script has restricted fetch context. POST requests are blocked by the extension's sandboxing, while GET requests pass through.

The Solution

Use popup windows (browser context) for Ollama POST requests instead of direct fetch from background script.

  • Popup context runs in full browser environment (like a regular tab)
  • No sandboxing restrictions on POST requests
  • Web Worker in popup handles actual API communication

Architecture

User clicks "Analyze"
    ↓
background.js receives request
    ↓
initializeOllamaPopup() opens popup window
    ↓
Popup (browser context) receives message
    ↓
Web Worker in popup makes POST to Ollama (no restrictions!)
    ↓
Worker streams response via worker messages
    ↓
Popup collects response and sends result back to background
    ↓
background.js processes result and applies label

Code Changes

background.js

  • initializeOllamaPopup(): Now waits for popup to send back analysis result
  • Listens for ollama_analysis_result_ message with result
  • Automatically closes popup after analysis completes
  • 30-second timeout for safety

api_ollama/ollama-popup.js

  • analysisResult variable: Stores the accumulated response
  • sendResultToBackground(): Sends result back via message after analysis completes
  • Listener for ollama_analyze command from background

Flow

  1. background.js calls initializeOllamaPopup()
  2. Popup opens and sends ollama_popup_ready_ message
  3. background.js sends ollama_analyze message with prompt
  4. Popup's worker processes with Ollama (no 403!)
  5. Worker sends tokens via newToken messages
  6. When done, popup sends ollama_analysis_result_ message
  7. background.js receives result and continues processing
  8. Popup auto-closes

Why This Works

  • Popup runs in normal browser context (not restricted extension background)
  • No sandboxing = POST requests work normally
  • Same localhost/Ollama as before, but from unrestricted context

Testing

The new XPI should now:

  1. Open a small popup window when analyzing
  2. See "Processing with Ollama..." status
  3. Collect response successfully
  4. Auto-close popup
  5. Apply label to email

No more 403 errors!

Files Updated:

  • background.js: initializeOllamaPopup() function, Ollama provider handling
  • api_ollama/ollama-popup.js: Result collection and sending
  • manifest.json: Already had web_accessible_resources

Version: 1.2.3.2 (popup-based Ollama analysis) Date: 2026-01-16 00:48