add more firefox caps/prefs

Signed-off-by: Andrei Gherghescu <[email protected]>

Author: andrei-ng

plotly_static/src/lib.rs

@@ -338,8 +338,11 @@ fn chrome_default_caps() -> Vec<&'static str> {
 #[cfg(feature = "geckodriver")]
 fn firefox_default_caps() -> Vec<&'static str> {
     vec![
-        "-headless",   // Essential for headless operation (single dash for Firefox)
-        "--no-remote", // Prevents connecting to existing Firefox instances
+        "-headless",     // Essential for headless operation (single dash for Firefox)
+        "--no-remote",   // Prevents connecting to existing Firefox instances
+        "--disable-gpu", // Disable GPU hardware acceleration
+        "--disable-software-rasterizer", // Disable software rasterizer
+        "--disable-dev-shm-usage", // Disable /dev/shm usage (common in CI)
     ]
 }
 
@@ -1101,6 +1104,28 @@ impl StaticExporter {
             debug!("Added Firefox binary capability: {firefox_path}");
         }
 
+        // Add Firefox-specific preferences for CI environments (when prefs are needed)
+        #[cfg(feature = "geckodriver")]
+        {
+            let mut prefs = JsonMap::new();
+            // Force software rendering and enable WebGL in headless mode
+            prefs.insert(
+                "layers.acceleration.disabled".to_string(),
+                serde_json::json!(true),
+            );
+            prefs.insert("gfx.webrender.all".to_string(), serde_json::json!(false));
+            prefs.insert(
+                "gfx.webrender.software".to_string(),
+                serde_json::json!(true),
+            );
+            prefs.insert("webgl.disabled".to_string(), serde_json::json!(false));
+            prefs.insert("webgl.force-enabled".to_string(), serde_json::json!(true));
+            prefs.insert("webgl.enable-webgl2".to_string(), serde_json::json!(true));
+
+            browser_opts.insert("prefs".to_string(), serde_json::json!(prefs));
+            debug!("Added Firefox preferences for CI compatibility");
+        }
+
         caps.insert(
             "browserName".to_string(),
             serde_json::json!(get_browser_name()),