diff --git a/packages/adblocker-benchmarks/Makefile b/packages/adblocker-benchmarks/Makefile
index 9f418b27c8..356d520170 100644
--- a/packages/adblocker-benchmarks/Makefile
+++ b/packages/adblocker-benchmarks/Makefile
@@ -1,5 +1,9 @@
 node_command := NODE_ENV=production node
 
+ifeq ($(DEBUG), 1)
+	run_options := $(run_options) --debug
+endif
+
 ifeq ($(SHOW_MEMORY), 1)
 	node_command := $(node_command) --expose-gc
 	run_options := $(run_options) --memory
diff --git a/packages/adblocker-benchmarks/blockers/adblockplus.js b/packages/adblocker-benchmarks/blockers/adblockplus.js
index 499c0ecf28..fb94939dce 100644
--- a/packages/adblocker-benchmarks/blockers/adblockplus.js
+++ b/packages/adblocker-benchmarks/blockers/adblockplus.js
@@ -79,6 +79,11 @@ module.exports = class AdblockPlus {
   }
 
   match(request) {
+    const text = this.matchDebug(request);
+    return text !== null && !text.startsWith('@@');
+  }
+
+  matchDebug(request) {
     const url = parseURL(request.url);
     const sourceURL = parseURL(request.frameUrl);
     const filter = this.matcher.match(
@@ -89,6 +94,6 @@ module.exports = class AdblockPlus {
       false,
     );
 
-    return filter !== null && !filter.text.startsWith('@@');
+    return filter === null ? null : filter.text;
   }
 };
diff --git a/packages/adblocker-benchmarks/blockers/tsurlfilter.js b/packages/adblocker-benchmarks/blockers/tsurlfilter.js
index 210cf2d2ab..668539e7b0 100644
--- a/packages/adblocker-benchmarks/blockers/tsurlfilter.js
+++ b/packages/adblocker-benchmarks/blockers/tsurlfilter.js
@@ -75,4 +75,11 @@ module.exports = class TSUrlFilter {
     const result = this.engine.matchRequest(request);
     return result.getBasicResult();
   }
+
+  matchDebug({ url, frameUrl, type }) {
+    const result = TSUrlFilter.hostsOnly ?
+                     this.matchHostname(url) :
+                     this.matchRequest({ url, frameUrl, type });
+    return result === null ? null : result.ruleText;
+  }
 };
diff --git a/packages/adblocker-benchmarks/run.js b/packages/adblocker-benchmarks/run.js
index e3e8fdbe7d..324bac363a 100644
--- a/packages/adblocker-benchmarks/run.js
+++ b/packages/adblocker-benchmarks/run.js
@@ -16,6 +16,7 @@ const requests = require('./requests.json');
 const ENGINE = process.argv[2];
 const FLAGS = process.argv.slice(3).filter(arg => arg.startsWith('--'));
 
+const DEBUG = FLAGS.includes('--debug');
 const HOSTS_ONLY = FLAGS.includes('--hosts-only');
 
 // Mute info-level output from uBlock Origin
@@ -127,6 +128,39 @@ async function memoryUsage(base = { heapUsed: 0, heapTotal: 0, }) {
   return ({ heapUsed, heapTotal, });
 }
 
+async function debug(moduleId, rawLists) {
+  const output = [];
+
+  const Cls = require(moduleId);
+
+  if (Cls.initialize) {
+    await Cls.initialize({ hostsOnly: HOSTS_ONLY });
+  }
+
+  const engine = await Cls.parse(rawLists);
+
+  for (let index = 0; index < requests.length; index += 1) {
+    const { url, frameUrl, cpt } = requests[index];
+
+    if (!isSupportedUrl(url) || !isSupportedUrl(frameUrl)) {
+      continue;
+    }
+
+    const match = engine.match({ type: WEBREQUEST_OPTIONS[cpt], frameUrl, url });
+
+    let matchDebug = null;
+    if (engine.matchDebug) {
+      matchDebug = engine.matchDebug({ type: WEBREQUEST_OPTIONS[cpt], frameUrl, url });
+    }
+
+    output.push({ index, url, frameUrl, cpt, match, matchDebug });
+  }
+
+  fs.writeFileSync(`./${ENGINE}.debug.json`, JSON.stringify(output, null, 2));
+
+  console.log(`./${ENGINE}.debug.json`);
+}
+
 async function main() {
   const rawLists = loadLists();
 
@@ -176,6 +210,10 @@ async function main() {
       process.exit(1);
   }
 
+  if (DEBUG) {
+    return debug(moduleId, rawLists);
+  }
+
   const baseMemory = await memoryUsage();
 
   // Initialize