Initial commit (without build artifacts)

.gitignore

@@ -86,3 +86,27 @@ typings/
 site-history.json
 bookmarks.json
 bookmarks.backup.json
+
+# AppImage / SteamOS
+squashfs-root/
+*.AppImage
+
+# Electron build output
+dist/
+build/
+out/
+release/
+
+# Native binaries
+nebula
+nebula.exe
+
+# Node/Electron
+node_modules/
+
+# Logs
+*.log
+
+# Build artifacts
+nebula-appdir/
+*.asar

GPU-FIX-README.md

@@ -1,101 +0,0 @@
-# GPU Fix Guide for Nebula Browser
-
-## Common GPU Issues
-
-Nebula Browser is an Electron-based application that uses Chromium's rendering engine. Some systems may experience GPU-related issues such as:
-- Black/blank screens
-- Webviews not loading content
-- Flickering or visual artifacts
-- Application crashes
-
-## SteamOS / Steam Deck
-
-### Symptoms
-On SteamOS (Steam Deck), you may see:
-- Browser chrome loads (tab bar, URL bar visible)
-- Web page content area is completely black/empty
-- No error messages visible
-
-### Cause
-This is caused by GPU compositing conflicts between Electron's Chromium renderer and Gamescope (Steam Deck's compositor). The AMD GPU in Steam Deck handles nested compositor contexts differently.
-
-### Solution
-
-**Option 1: Automatic Detection (Recommended)**
-The latest version of Nebula automatically detects SteamOS/Gamescope and applies the necessary fixes. Simply update to the latest version.
-
-**Option 2: Manual Launch Script**
-Use the provided `start-steamos.sh` script:
-```bash
-chmod +x start-steamos.sh
-./start-steamos.sh
-```
-
-**Option 3: Command-line Flags**
-If running manually, add these flags:
-```bash
-electron . --ozone-platform=x11 --disable-gpu-compositing --disable-gpu-vsync --no-sandbox --disable-dev-shm-usage
-```
-
-**Option 4: Environment Variable**
-Set the `ELECTRON_OZONE_PLATFORM_HINT` environment variable:
-```bash
-export ELECTRON_OZONE_PLATFORM_HINT=x11
-npm start
-```
-
-## Linux (General)
-
-### Wayland
-If running on a Wayland compositor (GNOME Wayland, KDE Wayland, Sway, etc.):
-```bash
-electron . --ozone-platform=wayland --enable-features=UseOzonePlatform,WaylandWindowDecorations
-```
-
-### X11
-For X11 sessions:
-```bash
-electron . --ozone-platform=x11
-```
-
-### NVIDIA GPUs
-If using NVIDIA proprietary drivers:
-```bash
-electron . --disable-gpu-sandbox --no-sandbox
-```
-
-## Windows
-
-### Intel/AMD Integrated Graphics Issues
-If experiencing blank screens on Windows with integrated graphics:
-1. Try running with `start-gpu-safe.bat`
-2. Update your graphics drivers
-3. Disable hardware acceleration in settings (if available)
-
-### Multiple GPU Systems
-On laptops with both integrated and discrete GPUs:
-- Right-click the Nebula shortcut
-- Select "Run with graphics processor"
-- Choose your dedicated GPU
-
-## macOS
-
-macOS typically has fewer GPU issues, but if problems occur:
-```bash
-electron . --disable-gpu
-```
-
-## Diagnostic Information
-
-To see GPU information and diagnostics:
-1. Open Nebula Browser
-2. Navigate to `nebula://gpu` or `chrome://gpu`
-3. Check the "Graphics Feature Status" section
-
-## Reporting Issues
-
-If none of the above solutions work, please report the issue with:
-1. Operating system and version
-2. GPU model and driver version
-3. Contents of `chrome://gpu` page
-4. Any error messages from terminal/console

README-STEAM.md

@@ -0,0 +1,44 @@
+Converting extracted AppImage (`squashfs-root`) into a distributable AppDir for Steam
+
+If your environment lacks `rsync`, use `cp -a` to copy the extracted AppImage into a clean AppDir and prepare it for upload to Steam.
+
+1) Copy the extracted AppImage to an AppDir folder
+```bash
+cp -a squashfs-root/ nebula-appdir
+```
+
+2) Unpack `app.asar` to edit or include app sources (optional; requires `npx asar`)
+```bash
+cd nebula-appdir/resources
+npx asar extract app.asar app
+# keep a backup if you want
+mv app app.orig && rm app.asar
+cd ../../
+```
+
+3) Add/verify launcher (we added `nebula-appdir/Nebula`):
+```bash
+chmod +x nebula-appdir/Nebula
+```
+Run locally:
+```bash
+cd nebula-appdir
+./Nebula
+```
+
+4) Ensure binary & permissions are correct
+```bash
+chmod +x nebula-appdir/nebula
+```
+
+5) Package or upload to Steam
+- Create a tarball to upload as game files, or upload the AppDir contents as the depot.
+```bash
+tar -czf nebula-appdir.tar.gz -C nebula-appdir .
+```
+- In Steamworks, set the launch command to `./Nebula` (or `./nebula`).
+
+Notes
+- `--no-sandbox` reduces Chromium sandboxing; prefer fixing `chrome-sandbox` and enabling sandboxing when possible.
+- Using the AppDir avoids AppImage/FUSE dependency on target systems.
+- Test on a clean SteamOS/Deck image before publishing.

gpu-config.js

@@ -5,36 +5,6 @@ class GPUConfig {
   constructor() {
     this.isGPUSupported = false;
     this.fallbackApplied = false;
-    this.isSteamOS = false;
-    this.isLinux = process.platform === 'linux';
-  }
-
-  // Detect if running on SteamOS/Steam Deck
-  detectSteamOS() {
-    if (!this.isLinux) return false;
-    
-    try {
-      const fs = require('fs');
-      // Check for SteamOS identifiers
-      if (fs.existsSync('/etc/steamos-release')) return true;
-      if (fs.existsSync('/usr/share/steamos/steamos.conf')) return true;
-      
-      // Check os-release for SteamOS
-      if (fs.existsSync('/etc/os-release')) {
-        const osRelease = fs.readFileSync('/etc/os-release', 'utf8');
-        if (osRelease.includes('SteamOS') || osRelease.includes('steamos')) return true;
-      }
-      
-      // Check if running under Gamescope (Steam Deck's compositor)
-      if (process.env.GAMESCOPE_WAYLAND_DISPLAY || process.env.SteamDeck) return true;
-      
-      // Check for Steam runtime environment
-      if (process.env.STEAM_RUNTIME || process.env.SteamAppId) return true;
-    } catch (err) {
-      console.log('SteamOS detection error:', err.message);
-    }
-    
-    return false;
   }
 
   // Apply GPU configuration based on system capabilities
@@ -45,64 +15,24 @@ class GPUConfig {
     const platform = process.platform;
     const arch = process.arch;
     
-    this.isSteamOS = this.detectSteamOS();
+    console.log(`Platform: ${platform}, Architecture: ${arch}`);
-    
-    console.log(`Platform: ${platform}, Architecture: ${arch}, SteamOS: ${this.isSteamOS}`);
-    
-    // Apply Linux/SteamOS specific configuration FIRST (before app ready)
-    if (this.isLinux) {
-      this.applyLinuxSettings();
-    }
     
     // Start with conservative settings that usually work
     this.applyConservativeSettings();
+
+    // On Linux/SteamOS, force disable GPU and sandbox to ensure webview stability
+    if (platform === 'linux') {
+      console.log('Linux detected: Disabling GPU and enforcing no-sandbox');
+      app.commandLine.appendSwitch('disable-gpu');
+      app.commandLine.appendSwitch('no-sandbox');
+      this.fallbackApplied = true;
+      return;
+    }
     
     // Try to enable GPU features progressively
     this.tryEnableGPU();
   }
 
-  // Linux-specific settings for proper rendering
-  applyLinuxSettings() {
-    console.log('Applying Linux-specific GPU settings...');
-    
-    // Ozone platform selection - critical for rendering on Linux
-    // Check for Wayland vs X11 environment
-    const waylandDisplay = process.env.WAYLAND_DISPLAY;
-    const gamescope = process.env.GAMESCOPE_WAYLAND_DISPLAY;
-    const x11Display = process.env.DISPLAY;
-    
-    if (this.isSteamOS || gamescope) {
-      // SteamOS/Gamescope: Force X11 backend for better compatibility
-      // Gamescope provides X11 compatibility layer that works better with Electron
-      console.log('SteamOS/Gamescope detected - using X11 Ozone backend');
-      app.commandLine.appendSwitch('ozone-platform', 'x11');
-      
-      // Disable GPU compositing issues on Steam Deck AMD GPU
-      app.commandLine.appendSwitch('disable-gpu-compositing');
-      app.commandLine.appendSwitch('disable-gpu-vsync');
-      
-      // Use software rendering for webviews if needed
-      app.commandLine.appendSwitch('disable-accelerated-2d-canvas');
-      
-      // Fix for AMD GPU rendering issues
-      app.commandLine.appendSwitch('use-gl', 'desktop');
-      app.commandLine.appendSwitch('enable-features', 'UseOzonePlatform');
-    } else if (waylandDisplay && !x11Display) {
-      // Pure Wayland environment
-      console.log('Wayland detected - using Wayland Ozone backend');
-      app.commandLine.appendSwitch('ozone-platform', 'wayland');
-      app.commandLine.appendSwitch('enable-features', 'UseOzonePlatform,WaylandWindowDecorations');
-    } else if (x11Display) {
-      // X11 environment
-      console.log('X11 detected - using X11 Ozone backend');
-      app.commandLine.appendSwitch('ozone-platform', 'x11');
-    }
-    
-    // Common Linux fixes
-    app.commandLine.appendSwitch('disable-features', 'VizDisplayCompositor');
-    app.commandLine.appendSwitch('enable-unsafe-swiftshader');
-  }
-
   applyConservativeSettings() {
     // Essential switches that usually don't cause issues
     app.commandLine.appendSwitch('no-sandbox');
@@ -119,26 +49,23 @@ class GPUConfig {
 
   tryEnableGPU() {
     try {
-      // Skip aggressive GPU features on SteamOS - they conflict with Gamescope
-      if (this.isSteamOS) {
-        console.log('SteamOS detected - skipping aggressive GPU acceleration');
-        return;
-      }
-      
       // GPU acceleration switches
       app.commandLine.appendSwitch('ignore-gpu-blacklist');
       app.commandLine.appendSwitch('ignore-gpu-blocklist');
-      app.commandLine.appendSwitch('enable-gpu-rasterization');
+
-      app.commandLine.appendSwitch('enable-zero-copy');
+      // On Linux/SteamOS, these aggressive flags can cause webview rendering issues (black screen)
+      // We disable them for Linux to ensure stability
+      if (process.platform !== 'linux') {
+        app.commandLine.appendSwitch('enable-gpu-rasterization');
+        app.commandLine.appendSwitch('enable-zero-copy');
+      }
       
       // Video acceleration (usually safer than full GPU)
       app.commandLine.appendSwitch('enable-accelerated-video-decode');
       app.commandLine.appendSwitch('enable-accelerated-mjpeg-decode');
       
-      // Conservative feature enabling - skip on Linux to avoid conflicts
+      // Conservative feature enabling
-      if (!this.isLinux) {
+      app.commandLine.appendSwitch('enable-features', 'VaapiVideoDecoder');
-        app.commandLine.appendSwitch('enable-features', 'VaapiVideoDecoder');
-      }
       
       console.log('GPU acceleration switches applied');
     } catch (err) {

make-appdir.sh

@@ -0,0 +1,59 @@
+#!/usr/bin/env bash
+# Assemble nebula-appdir from extracted squashfs-root
+set -euo pipefail
+SRC="${1:-squashfs-root}"
+DEST="${2:-nebula-appdir}"
+
+if [ ! -d "$SRC" ]; then
+  echo "Source $SRC not found. Extract the AppImage first (./dist/Nebula-*.AppImage --appimage-extract)"
+  exit 1
+fi
+
+# Copy extracted contents into DEST
+mkdir -p "$DEST"
+cp -a "$SRC/." "$DEST/"
+
+# Ensure launcher/binary exist
+if [ -f "$DEST/run-nebula.sh" ]; then
+  mv "$DEST/run-nebula.sh" "$DEST/Nebula" 2>/dev/null || true
+fi
+chmod +x "$DEST/Nebula" || true
+
+# Ensure directories for icons and desktop entries
+mkdir -p "$DEST/usr/share/icons/hicolor/256x256/apps"
+mkdir -p "$DEST/usr/share/applications"
+
+# Copy icon if present at top level of extracted AppImage
+if [ -f "$SRC/nebula.png" ]; then
+  cp "$SRC/nebula.png" "$DEST/usr/share/icons/hicolor/256x256/apps/nebula.png"
+fi
+
+# Also embed project icon if present in repo assets
+PROJECT_ICON="$(cd "$(dirname "$0")" && pwd)/assets/images/Logos/Nebula-Favicon.png"
+if [ -f "$PROJECT_ICON" ]; then
+  echo "Embedding project icon into AppDir: $PROJECT_ICON"
+  cp "$PROJECT_ICON" "$DEST/usr/share/icons/hicolor/256x256/apps/nebula.png"
+fi
+
+# Install desktop file into AppDir
+if [ -f "$DEST/nebula.desktop" ]; then
+  cp "$DEST/nebula.desktop" "$DEST/usr/share/applications/nebula.desktop"
+else
+  cat > "$DEST/usr/share/applications/nebula.desktop" <<'EOF'
+[Desktop Entry]
+Name=Nebula
+Comment=Nebula Browser
+Exec=./Nebula %U
+Terminal=false
+Type=Application
+Icon=nebula
+Categories=Network;WebBrowser;
+StartupWMClass=Nebula
+EOF
+fi
+
+# Fix permissions
+chmod -R a+r "$DEST/usr/share/icons/hicolor/256x256/apps" || true
+chmod +x "$DEST/Nebula" || true
+
+echo "AppDir assembled at $DEST. Run with: $DEST/Nebula"

package.json

@@ -5,8 +5,8 @@
   "main": "main.js",
   "scripts": {
     "start": "electron .",
-    "start:steamos": "electron . --ozone-platform=x11 --disable-gpu-compositing --disable-gpu-vsync --no-sandbox --disable-dev-shm-usage --disable-features=VizDisplayCompositor",
+    "start:dev": "electron . --no-sandbox --disable-gpu",
-    "start:linux-safe": "electron . --disable-gpu --disable-gpu-compositing --no-sandbox",
+    "start:linux": "electron . --no-sandbox",
     "dist": "electron-builder",
     "run": "electron ."
   },

preload.js

@@ -1,5 +1,11 @@
 // preload.js - Optimized version
 const { contextBridge, ipcRenderer } = require('electron');
+let pathModule;
+try {
+  pathModule = require('path');
+} catch (err) {
+  pathModule = null;
+}
 
 // Cache DOM references for performance
 let domReady = false;
@@ -75,6 +81,27 @@ const electronAPI = {
   saveImageFromNet: async (url) => ipcRenderer.invoke('save-image-from-url', { url })
 };
 
+// Provide absolute path to the renderer preload for webview guests so
+// webview `preload` attributes use an absolute, resolvable path on all platforms.
+const webviewPreloadAbsolutePath = pathModule ? pathModule.join(__dirname, 'preload.js') : null;
+electronAPI.getWebviewPreloadPath = () => webviewPreloadAbsolutePath;
+
+// Fixup any static <webview preload="..."> attributes in the DOM early so
+// guests receive an absolute path instead of a relative one that may fail
+// to resolve inside the guest process.
+window.addEventListener('DOMContentLoaded', () => {
+  try {
+    if (webviewPreloadAbsolutePath) {
+      const els = document.querySelectorAll('webview[preload]');
+      for (const el of els) {
+        try { el.setAttribute('preload', webviewPreloadAbsolutePath); } catch {};
+      }
+    }
+  } catch (e) {
+    // non-fatal
+  }
+});
+
 // Cache for bookmarks to reduce IPC calls
 let bookmarksCache = null;
 let bookmarksCacheTime = 0;

renderer/script.js

@@ -368,7 +368,16 @@ function createTab(inputUrl) {
   webview.src = resolvedUrl;
   webview.setAttribute('allowpopups', '');
   webview.setAttribute('partition', 'persist:main');
-  webview.setAttribute('preload', '../preload.js');
+  // Use absolute preload path provided by the main-window preload to ensure
+  // the guest process can resolve the file (important on Linux/SteamOS).
+  try {
+    const preloadPath = (window.electronAPI && typeof window.electronAPI.getWebviewPreloadPath === 'function')
+      ? window.electronAPI.getWebviewPreloadPath()
+      : '../preload.js';
+    webview.setAttribute('preload', preloadPath);
+  } catch (e) {
+    webview.setAttribute('preload', '../preload.js');
+  }
   // Add attributes needed for Google OAuth and sign-in flows
   webview.setAttribute('webpreferences', 'allowRunningInsecureContent=false,javascript=true,webSecurity=true');
   try {
@@ -667,7 +676,14 @@ function convertHomeTabToWebview(tabId, inputUrl, resolvedUrl) {
   webview.src = resolvedUrl;
   webview.setAttribute('allowpopups', '');
   webview.setAttribute('partition', 'persist:main');
-  webview.setAttribute('preload', '../preload.js');
+  try {
+    const preloadPath = (window.electronAPI && typeof window.electronAPI.getWebviewPreloadPath === 'function')
+      ? window.electronAPI.getWebviewPreloadPath()
+      : '../preload.js';
+    webview.setAttribute('preload', preloadPath);
+  } catch (e) {
+    webview.setAttribute('preload', '../preload.js');
+  }
   // Add attributes needed for Google OAuth and sign-in flows
   webview.setAttribute('webpreferences', 'allowRunningInsecureContent=false,javascript=true,webSecurity=true');
   try {

start-steamos.sh

@@ -1,31 +0,0 @@
-#!/bin/bash
-# SteamOS/Steam Deck launch script for Nebula Browser
-# This script applies necessary flags for proper rendering on SteamOS/Gamescope
-
-# Detect if running on SteamOS
-if [ -f /etc/steamos-release ] || [ -f /usr/share/steamos/steamos.conf ]; then
-    echo "SteamOS detected"
-fi
-
-# Detect if running under Gamescope (Steam Deck's compositor)
-if [ -n "$GAMESCOPE_WAYLAND_DISPLAY" ] || [ -n "$SteamDeck" ]; then
-    echo "Gamescope/Steam Deck environment detected"
-fi
-
-# Get the directory where this script is located
-SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-
-# Launch Nebula with SteamOS-compatible flags
-# These flags help with webview rendering issues on AMD GPUs under Gamescope
-exec electron "$SCRIPT_DIR" \
-    --ozone-platform=x11 \
-    --disable-gpu-compositing \
-    --disable-gpu-vsync \
-    --disable-accelerated-2d-canvas \
-    --use-gl=desktop \
-    --no-sandbox \
-    --disable-dev-shm-usage \
-    --disable-gpu-sandbox \
-    --disable-features=VizDisplayCompositor \
-    --enable-unsafe-swiftshader \
-    "$@"