Misc fixes beta.13

- Fixed some memory enhancement prefs not setting correctly.
- Bfcache is now completely disabled. This should improve memory, but kills Playwright's page.go_back() and page.go_forward(). To re-enable this, set `browser.sessionhistory.max_entries` to the amount of pages you want to remember.
- Moved SanitizeOnShutdown policy to preferences instead. This unlocks clearOnShutdown preferences. #47
- Added experimental memorysaver property that clears all of the memory after each page.goto navigation. Helpful for datacenters running Camoufox, but could potentially break things.
- Cursor now starts in a random position on the screen
- Fixed screenshots not capturing the full window when a viewport is set by window.innerWidth and window.innerHeight.

additions/juggler/TargetRegistry.js

@@ -383,7 +383,11 @@ class PageTarget {
     this._tab = tab;
     this._linkedBrowser = tab.linkedBrowser;
     this._browserContext = browserContext;
-    this._viewportSize = undefined;
+    // Set the viewport size to Camoufox's default value.
+    this._viewportSize = {
+      width: ChromeUtils.camouGetInt("window.innerWidth") || 1280,
+      height: ChromeUtils.camouGetInt("window.innerHeight") || 720,
+    };;
     this._initialDPPX = this._linkedBrowser.browsingContext.overrideDPPX;
     this._url = 'about:blank';
     this._openerId = opener ? opener.id() : undefined;
@@ -570,14 +574,12 @@ class PageTarget {
     // Otherwise, explicitly set page viewport prevales over browser context
     // default viewport.
 
-    // Do not allow default viewport size if Camoufox set it first
+    // Camoufox is already handling viewport size, so we don't need to set it here.
     if (
-      !this._viewportSize &&
-      this._browserContext.defaultViewportSize && (
-        ChromeUtils.camouGetInt("window.outerWidth") ||
-        ChromeUtils.camouGetInt("window.outerHeight") ||
-        ChromeUtils.camouGetInt("window.innerWidth") ||
-        ChromeUtils.camouGetInt("window.innerHeight"))
+      ChromeUtils.camouGetInt("window.outerWidth") ||
+      ChromeUtils.camouGetInt("window.outerHeight") ||
+      ChromeUtils.camouGetInt("window.innerWidth") ||
+      ChromeUtils.camouGetInt("window.innerHeight")
     ) {
       return;
     }

additions/juggler/protocol/PageHandler.js

@@ -80,8 +80,17 @@ class PageHandler {
     }
 
     this._isDragging = false;
-    this._lastMousePosition = { x: 0, y: 0 };
-    this._lastTrackedPos = { x: 0, y: 0 };
+
+    // Camoufox: set a random default cursor position
+    let random_val = (max_val) => Math.floor(Math.random() * max_val);
+
+    // Try to fetch the viewport size
+    this._defaultCursorPos = {
+      x: random_val(this._pageTarget._viewportSize.width),
+      y: random_val(this._pageTarget._viewportSize.height),
+    };
+    this._lastMousePosition = { ...this._defaultCursorPos };
+    this._lastTrackedPos = { ...this._defaultCursorPos };
 
     this._reportedFrameIds = new Set();
     this._networkEventsForUnreportedFrameIds = new Map();
@@ -423,6 +432,14 @@ class PageHandler {
     });
     unsubscribe();
 
+    if (ChromeUtils.camouGetBool('memorysaver', false)) {
+      ChromeUtils.camouDebug('Clearing all memory...');
+      Services.obs.notifyObservers(null, "child-gc-request");
+      Cu.forceGC();
+      Services.obs.notifyObservers(null, "child-cc-request");
+      Cu.forceCC();
+    }
+
     return {
       navigationId: sameDocumentNavigation ? null : navigationId,
     };
@@ -558,8 +575,8 @@ class PageHandler {
         // NOTE: since this won't go inside the renderer, there's no need to wait for ACK.
         win.windowUtils.sendMouseEvent(
           'mousemove',
-          0 /* x */,
-          0 /* y */,
+          this._defaultCursorPos.x,
+          this._defaultCursorPos.y,
           button,
           clickCount,
           modifiers,