diff --git a/package.json b/package.json
index 2039ee647b4a..ecbbdf4d4a54 100644
--- a/package.json
+++ b/package.json
@@ -78,6 +78,7 @@
     "npm-run-posix-or-windows": "^2.0.2",
     "sinon": "^2.3.5",
     "typescript": "^2.8.0-rc",
+    "vscode-chrome-debug-core": "^3.23.8",
     "zone.js": "^0.7.3"
   },
   "dependencies": {
diff --git a/typings/audit.d.ts b/typings/audit.d.ts
index 167415dc92aa..768c27108699 100644
--- a/typings/audit.d.ts
+++ b/typings/audit.d.ts
@@ -4,85 +4,90 @@
  * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
  */
 
-declare namespace LH.Audit {
-  export interface ScoringModes {
-    NUMERIC: 'numeric';
-    BINARY: 'binary';
-  }
+declare global {
+  module LH.Audit {
+    export interface ScoringModes {
+      NUMERIC: 'numeric';
+      BINARY: 'binary';
+    }
 
-  export type ScoringModeValue = Audit.ScoringModes[keyof Audit.ScoringModes];
+    export type ScoringModeValue = Audit.ScoringModes[keyof Audit.ScoringModes];
 
-  export interface Meta {
-    name: string;
-    description: string;
-    helpText: string;
-    requiredArtifacts: Array<string>;
-    failureDescription?: string;
-    informative?: boolean;
-    manual?: boolean;
-    scoreDisplayMode?: Audit.ScoringModeValue;
-  }
+    export interface Meta {
+      name: string;
+      description: string;
+      helpText: string;
+      requiredArtifacts: Array<string>;
+      failureDescription?: string;
+      informative?: boolean;
+      manual?: boolean;
+      scoreDisplayMode?: Audit.ScoringModeValue;
+    }
 
-  export interface Heading {
-    key: string;
-    itemType: string;
-    text: string;
-  }
+    export interface Heading {
+      key: string;
+      itemType: string;
+      text: string;
+    }
 
-  export interface HeadingsResult {
-    results: number;
-    headings: Array<Audit.Heading>;
-    passes: boolean;
-    debugString?: string;
-  }
+    export interface HeadingsResult {
+      results: number;
+      headings: Array<Audit.Heading>;
+      passes: boolean;
+      debugString?: string;
+    }
 
-  // TODO: placeholder typedefs until Details are typed
-  export interface DetailsRendererDetailsSummary {
-    wastedMs?: number;
-    wastedBytes?: number;
-  }
+    // TODO: placeholder typedefs until Details are typed
+    export interface DetailsRendererDetailsSummary {
+      wastedMs?: number;
+      wastedBytes?: number;
+    }
 
-  // TODO: placeholder typedefs until Details are typed
-  export interface DetailsRendererDetailsJSON {
-    type: 'table';
-    headings: Array<Audit.Heading>;
-    items: Array<{[x: string]: string}>;
-    summary: DetailsRendererDetailsSummary;
-  }
+    // TODO: placeholder typedefs until Details are typed
+    export interface DetailsRendererDetailsJSON {
+      type: 'table';
+      headings: Array<Audit.Heading>;
+      items: Array<{[x: string]: string}>;
+      summary: DetailsRendererDetailsSummary;
+    }
 
-  // Type returned by Audit.audit(). Only rawValue is required.
-  export interface Product {
-    rawValue: boolean | number | null;
-    displayValue?: string;
-    debugString?: string;
-    score?: number;
-    extendedInfo?: {value: string};
-    notApplicable?: boolean;
-    error?: boolean;
-    // TODO: define details
-    details?: object;
-  }
+    // Type returned by Audit.audit(). Only rawValue is required.
+    export interface Product {
+      rawValue: boolean | number | null;
+      displayValue?: string;
+      debugString?: string;
+      score?: number;
+      extendedInfo?: {value: string};
+      notApplicable?: boolean;
+      error?: boolean;
+      // TODO: define details
+      details?: object;
+    }
 
-  /* Audit result returned in Lighthouse report. All audits offer a description and score of 0-1 */
-  export interface Result {
-    rawValue: boolean | number | null;
-    displayValue: string;
-    debugString?: string;
-    score: number;
-    scoreDisplayMode: ScoringModeValue;
-    description: string;
-    extendedInfo?: {value: string};
-    notApplicable?: boolean;
-    error?: boolean;
-    name: string;
-    helpText?: string;
-    informative?: boolean;
-    manual?: boolean;
-    // TODO: define details
-    details?: object;
-  }
+    /* Audit result returned in Lighthouse report. All audits offer a description and score of 0-1 */
+    export interface Result {
+      rawValue: boolean | number | null;
+      displayValue: string;
+      debugString?: string;
+      score: number;
+      scoreDisplayMode: ScoringModeValue;
+      description: string;
+      extendedInfo?: {value: string};
+      notApplicable?: boolean;
+      error?: boolean;
+      name: string;
+      helpText?: string;
+      informative?: boolean;
+      manual?: boolean;
+      // TODO: define details
+      details?: object;
+    }
 
-  export interface Results {
-    [metric: string]: Result;
+    export interface Results {
+      [metric: string]: Result;
+    }
   }
 }
+
+// empty export to keep file a module
+export {}
diff --git a/typings/externs.d.ts b/typings/externs.d.ts
index b55ce83ad7bf..e14ca9d5b799 100644
--- a/typings/externs.d.ts
+++ b/typings/externs.d.ts
@@ -4,110 +4,115 @@
  * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
  */
 
-declare namespace LH {
-
-  export interface Flags {
-    _: string[];
-    port: number;
-    chromeFlags: string;
-    output: any;
-    outputPath: string;
-    saveAssets: boolean;
-    view: boolean;
-    maxWaitForLoad: number;
-    logLevel: string;
-    hostname: string;
-    blockedUrlPatterns: string[];
-    extraHeaders: string;
-    enableErrorReporting: boolean;
-    listAllAudits: boolean;
-    listTraceCategories: boolean;
-    auditMode: boolean|string;
-    gatherMode: boolean|string;
-    configPath?: string;
-    perf: boolean;
-    mixedContent: boolean;
-    verbose: boolean;
-    quiet: boolean;
-  }
-
-  export interface Config {}
-
-  export interface Results {
-    url: string;
-    audits: LH.Audit.Results;
-    lighthouseVersion: string;
-    artifacts?: Object;
-    initialUrl: string;
-    generatedTime: string;
-  }
-
-  export interface LaunchedChrome {
-    pid: number;
-    port: number;
-    kill: () => Promise<{}>;
-  }
-
-  export interface LighthouseError extends Error {
-    code?: string;
-    friendlyMessage?: string;
-  }
-
-  export interface TraceEvent {
-    name: string;
-    args: any;
-    tid: number;
-    ts: number;
-    dur: number;
-  }
-
-  export interface NetworkRequest {
-    requestId: string;
-    connectionId: string;
-    connectionReused: boolean;
-
-    url: string;
-    protocol: string;
-    origin: string | null;
-    parsedURL: DevToolsParsedURL;
-
-    startTime: number;
-    endTime: number;
-
-    transferSize: number;
-
-    _initiator: NetworkRequestInitiator;
-    _timing: NetworkRequestTiming;
-    _resourceType: any;
-    priority(): 'VeryHigh' | 'High' | 'Medium' | 'Low';
-  }
-
-  export interface NetworkRequestInitiator {
-    type: 'script' | 'parser';
-  }
-
-  export interface NetworkRequestTiming {
-    connectStart: number;
-    connectEnd: number
-    sslStart: number;
-    sslEnd: number;
-    sendStart: number;
-    sendEnd: number;
-    receiveHeadersEnd: number;
-  }
-
-  export interface DevToolsParsedURL {
-    scheme: string;
-    host: string;
-  }
-
-  export interface DevToolsJsonTarget {
-    description: string;
-    devtoolsFrontendUrl: string;
-    id: string;
-    title: string;
-    type: string;
-    url: string;
-    webSocketDebuggerUrl: string;
+import _Crdp from "../node_modules/vscode-chrome-debug-core/lib/crdp/crdp";
+
+declare global {
+  module LH {
+    export import Crdp = _Crdp;
+
+    export interface Flags {
+      _: string[];
+      port: number;
+      chromeFlags: string;
+      output: any;
+      outputPath: string;
+      saveAssets: boolean;
+      view: boolean;
+      maxWaitForLoad: number;
+      logLevel: string;
+      hostname: string;
+      blockedUrlPatterns: string[];
+      extraHeaders: string;
+      enableErrorReporting: boolean;
+      listAllAudits: boolean;
+      listTraceCategories: boolean;
+      auditMode: boolean|string;
+      gatherMode: boolean|string;
+      configPath?: string;
+      perf: boolean;
+      mixedContent: boolean;
+      verbose: boolean;
+      quiet: boolean;
+    }
+
+    export interface Config {}
+
+    export interface Results {
+      url: string;
+      audits: Audit.Results;
+      lighthouseVersion: string;
+      artifacts?: Object;
+      initialUrl: string;
+      generatedTime: string;
+    }
+
+    export interface LaunchedChrome {
+      pid: number;
+      port: number;
+      kill: () => Promise<{}>;
+    }
+
+    export interface LighthouseError extends Error {
+      code?: string;
+      friendlyMessage?: string;
+    }
+
+    export interface TraceEvent {
+      name: string;
+      args: any;
+      tid: number;
+      ts: number;
+      dur: number;
+    }
+
+    export interface NetworkRequest {
+      requestId: string;
+      connectionId: string;
+      connectionReused: boolean;
+
+      url: string;
+      protocol: string;
+      origin: string | null;
+      parsedURL: DevToolsParsedURL;
+
+      startTime: number;
+      endTime: number;
+
+      transferSize: number;
+
+      _initiator: NetworkRequestInitiator;
+      _timing: NetworkRequestTiming;
+      _resourceType: any;
+      priority(): 'VeryHigh' | 'High' | 'Medium' | 'Low';
+    }
+
+    export interface NetworkRequestInitiator {
+      type: 'script' | 'parser';
+    }
+
+    export interface NetworkRequestTiming {
+      connectStart: number;
+      connectEnd: number
+      sslStart: number;
+      sslEnd: number;
+      sendStart: number;
+      sendEnd: number;
+      receiveHeadersEnd: number;
+    }
+
+    export interface DevToolsParsedURL {
+      scheme: string;
+      host: string;
+    }
+
+    export interface DevToolsJsonTarget {
+      description: string;
+      devtoolsFrontendUrl: string;
+      id: string;
+      title: string;
+      type: string;
+      url: string;
+      webSocketDebuggerUrl: string;
+    }
   }
 }
diff --git a/typings/gatherer.d.ts b/typings/gatherer.d.ts
index ca2f627df85b..1f5b7fa5340c 100644
--- a/typings/gatherer.d.ts
+++ b/typings/gatherer.d.ts
@@ -4,14 +4,19 @@
  * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
  */
 
-declare namespace LH.Gatherer {
-  export interface PassContext {
-    options: object;
-  }
+declare global {
+  module LH.Gatherer {
+    export interface PassContext {
+      options: object;
+    }
 
-  export interface LoadData {
-    networkRecords: Array<LH.NetworkRequest>;
-    devtoolsLog: Array<void>;
-    trace: {trraceEvents: Array<LH.TraceEvent>}
+    export interface LoadData {
+      networkRecords: Array<void>;
+      devtoolsLog: Array<void>;
+      trace: {traceEvents: Array<TraceEvent>}
+    }
   }
 }
+
+// empty export to keep file a module
+export {}
diff --git a/yarn.lock b/yarn.lock
index 292a06935c3c..ed9f31d92499 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -143,6 +143,10 @@
     "@types/rx-lite-time" "*"
     "@types/rx-lite-virtualtime" "*"
 
+"@types/source-map@^0.1.27":
+  version "0.1.29"
+  resolved "https://registry.yarnpkg.com/@types/source-map/-/source-map-0.1.29.tgz#d7048a60180b09f8aa6d53bda311c6b51cbd7018"
+
 "@types/through@*":
   version "0.0.29"
   resolved "https://registry.yarnpkg.com/@types/through/-/through-0.0.29.tgz#72943aac922e179339c651fa34a4428a4d722f93"
@@ -1811,7 +1815,7 @@ glob@^5.0.15:
     once "^1.3.0"
     path-is-absolute "^1.0.0"
 
-glob@^7.0.0, glob@^7.0.3, glob@^7.1.2:
+glob@^7.0.0, glob@^7.0.3, glob@^7.0.6, glob@^7.1.2:
   version "7.1.2"
   resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.2.tgz#c19c9df9a028702d678612384a6552404c636d15"
   dependencies:
@@ -2992,6 +2996,10 @@ node-uuid@~1.4.7:
   version "1.4.7"
   resolved "https://registry.yarnpkg.com/node-uuid/-/node-uuid-1.4.7.tgz#6da5a17668c4b3dd59623bda11cf7fa4c1f60a6f"
 
+noice-json-rpc@1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/noice-json-rpc/-/noice-json-rpc-1.0.1.tgz#5e7289a60a1c20880489cb15101552bac392266e"
+
 nopt@3.x:
   version "3.0.6"
   resolved "https://registry.yarnpkg.com/nopt/-/nopt-3.0.6.tgz#c6465dbf08abcd4db359317f79ac68a646b28ff9"
@@ -3762,6 +3770,10 @@ source-map@^0.5.0, source-map@^0.5.1, source-map@^0.5.3, source-map@~0.5.1:
   version "0.5.6"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.5.6.tgz#75ce38f52bf0733c5a7f0c118d81334a2bb5f412"
 
+source-map@^0.6.1:
+  version "0.6.1"
+  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
+
 source-map@~0.2.0:
   version "0.2.0"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.2.0.tgz#dab73fbcfc2ba819b4de03bd6f6eaa48164b3f9d"
@@ -4244,6 +4256,38 @@ vinyl@^2.0.1:
     remove-trailing-separator "^1.0.1"
     replace-ext "^1.0.0"
 
+vscode-chrome-debug-core@^3.23.8:
+  version "3.23.8"
+  resolved "https://registry.yarnpkg.com/vscode-chrome-debug-core/-/vscode-chrome-debug-core-3.23.8.tgz#f0fd1582b6d7653d327171104b9c8e2eebb6bf41"
+  dependencies:
+    "@types/source-map" "^0.1.27"
+    glob "^7.0.6"
+    noice-json-rpc "1.0.1"
+    source-map "^0.6.1"
+    vscode-debugadapter "^1.28.0-pre.2"
+    vscode-debugprotocol "^1.28.0-pre.1"
+    vscode-nls "^3.2.1"
+    ws "^3.3.2"
+
+vscode-debugadapter@^1.28.0-pre.2:
+  version "1.28.0-pre.2"
+  resolved "https://registry.yarnpkg.com/vscode-debugadapter/-/vscode-debugadapter-1.28.0-pre.2.tgz#165ccd179f5a43319c8d6a3dc77832e9392ae254"
+  dependencies:
+    vscode-debugprotocol "1.28.0-pre.1"
+    vscode-uri "1.0.1"
+
+vscode-debugprotocol@1.28.0-pre.1, vscode-debugprotocol@^1.28.0-pre.1:
+  version "1.28.0-pre.1"
+  resolved "https://registry.yarnpkg.com/vscode-debugprotocol/-/vscode-debugprotocol-1.28.0-pre.1.tgz#2641b753cbb78416e897a2f1653e7bc391d2db0b"
+
+vscode-nls@^3.2.1:
+  version "3.2.2"
+  resolved "https://registry.yarnpkg.com/vscode-nls/-/vscode-nls-3.2.2.tgz#3817eca5b985c2393de325197cf4e15eb2aa5350"
+
+vscode-uri@1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/vscode-uri/-/vscode-uri-1.0.1.tgz#11a86befeac3c4aa3ec08623651a3c81a6d0bbc8"
+
 webidl-conversions@^3.0.0:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/webidl-conversions/-/webidl-conversions-3.0.1.tgz#24534275e2a7bc6be7bc86611cc16ae0a5654871"
@@ -4353,6 +4397,14 @@ ws@3.3.2:
     safe-buffer "~5.1.0"
     ultron "~1.1.0"
 
+ws@^3.3.2:
+  version "3.3.3"
+  resolved "https://registry.yarnpkg.com/ws/-/ws-3.3.3.tgz#f1cf84fe2d5e901ebce94efaece785f187a228f2"
+  dependencies:
+    async-limiter "~1.0.0"
+    safe-buffer "~5.1.0"
+    ultron "~1.1.0"
+
 xdg-basedir@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/xdg-basedir/-/xdg-basedir-3.0.0.tgz#496b2cc109eca8dbacfe2dc72b603c17c5870ad4"