--- a/devtools/bootstrap.js
+++ b/devtools/bootstrap.js
@@ -72,17 +72,17 @@ function interpretPreprocessingInstructi
       }
       ignoring = !ifMap[line];
     } else if (line.startsWith("#else")) {
       ignoring = !ignoring;
     } else if (line.startsWith("#endif")) {
       ignoring = false;
     }
 
-    let isPrefLine = /^ *pref\("([^"]+)"/.test(line);
+    let isPrefLine = /^ *(sticky_)?pref\("([^"]+)"/.test(line);
     if (continuation || (!ignoring && isPrefLine)) {
       newLines.push(line);
 
       // The call to pref(...); might span more than one line.
       continuation = !/\);/.test(line);
     }
   }
   return newLines.join("\n");