diff --git a/devtools/client/debugger/src/components/PrimaryPanes/SourcesTreeItem.js b/devtools/client/debugger/src/components/PrimaryPanes/SourcesTreeItem.js
index 573d78973cec..8a920e00ff7f 100644
--- a/devtools/client/debugger/src/components/PrimaryPanes/SourcesTreeItem.js
+++ b/devtools/client/debugger/src/components/PrimaryPanes/SourcesTreeItem.js
@@ -19,6 +19,7 @@ import {
   hasPrettySource as checkHasPrettySource,
   getContext,
   getMainThread,
+  getSourceContent,
 } from "../../selectors";
 import actions from "../../actions";
 
@@ -31,9 +32,16 @@ import {
 import { isDirectory } from "../../utils/sources-tree";
 import { copyToTheClipboard } from "../../utils/clipboard";
 import { features } from "../../utils/prefs";
+import { downloadFile } from "../../utils/utils";
 
 import type { TreeNode } from "../../utils/sources-tree/types";
-import type { Source, Context, MainThread, Thread } from "../../types";
+import type {
+  Source,
+  Context,
+  MainThread,
+  Thread,
+  SourceContent,
+} from "../../types";
 
 type Props = {
   autoExpand: ?boolean,
@@ -42,6 +50,7 @@ type Props = {
   projectRoot: string,
   source: ?Source,
   item: TreeNode,
+  sourceContent: SourceContent,
   depth: number,
   focused: boolean,
   expanded: boolean,
@@ -56,6 +65,7 @@ type Props = {
   clearProjectDirectoryRoot: typeof actions.clearProjectDirectoryRoot,
   setProjectDirectoryRoot: typeof actions.setProjectDirectoryRoot,
   toggleBlackBox: typeof actions.toggleBlackBox,
+  loadSourceText: typeof actions.loadSourceText,
 };
 
 type State = {};
@@ -122,7 +132,14 @@ class SourceTreeItem extends Component<Props, State> {
             disabled: !shouldBlackbox(source),
             click: () => this.props.toggleBlackBox(cx, source),
           };
-          menuOptions.push(copySourceUri2, blackBoxMenuItem);
+          const downloadFileItem = {
+            id: "node-menu-download-file",
+            label: L10N.getStr("downloadFile.label"),
+            accesskey: L10N.getStr("downloadFile.accesskey"),
+            disabled: false,
+            click: () => this.handleDownloadFile(cx, source, item),
+          };
+          menuOptions.push(copySourceUri2, blackBoxMenuItem, downloadFileItem);
         }
       }
     }
@@ -156,6 +173,15 @@ class SourceTreeItem extends Component<Props, State> {
     showMenu(event, menuOptions);
   };
 
+  handleDownloadFile = async (cx: Context, source: ?Source, item: TreeNode) => {
+    const name = item.name;
+    if (!this.props.sourceContent) {
+      await this.props.loadSourceText({ cx, source });
+    }
+    const data = this.props.sourceContent;
+    downloadFile(data, name);
+  };
+
   addCollapseExpandAllOptions = (menuOptions: ContextMenu, item: TreeNode) => {
     const { setExpanded } = this.props;
 
@@ -310,6 +336,11 @@ function getHasMatchingGeneratedSource(state, source: ?Source) {
   return !!getGeneratedSourceByURL(state, source.url);
 }
 
+function getSourceContentValue(state, source: Source) {
+  const content = getSourceContent(state, source.id);
+  return content !== null ? content.value : false;
+}
+
 const mapStateToProps = (state, props) => {
   const { source } = props;
   return {
@@ -318,6 +349,7 @@ const mapStateToProps = (state, props) => {
     hasMatchingGeneratedSource: getHasMatchingGeneratedSource(state, source),
     hasSiblingOfSameName: getHasSiblingOfSameName(state, source),
     hasPrettySource: source ? checkHasPrettySource(state, source.id) : false,
+    sourceContent: source ? getSourceContentValue(state, source) : false,
   };
 };
 
@@ -327,5 +359,6 @@ export default connect(
     setProjectDirectoryRoot: actions.setProjectDirectoryRoot,
     clearProjectDirectoryRoot: actions.clearProjectDirectoryRoot,
     toggleBlackBox: actions.toggleBlackBox,
+    loadSourceText: actions.loadSourceText,
   }
 )(SourceTreeItem);
diff --git a/devtools/client/debugger/src/components/PrimaryPanes/tests/SourcesTreeItem.spec.js b/devtools/client/debugger/src/components/PrimaryPanes/tests/SourcesTreeItem.spec.js
index 643943b66163..9e33b7ae7906 100644
--- a/devtools/client/debugger/src/components/PrimaryPanes/tests/SourcesTreeItem.spec.js
+++ b/devtools/client/debugger/src/components/PrimaryPanes/tests/SourcesTreeItem.spec.js
@@ -91,6 +91,13 @@ describe("SourceTreeItem", () => {
           id: "node-menu-blackbox",
           label: "Blackbox source",
         },
+        {
+          accesskey: "d",
+          click: expect.any(Function),
+          disabled: false,
+          id: "node-menu-download-file",
+          label: "Download file",
+        },
       ];
       const mockEvent = {
         preventDefault: jest.fn(),
@@ -104,7 +111,6 @@ describe("SourceTreeItem", () => {
       await instance.onContextMenu(mockEvent, item, source);
 
       expect(showMenu).toHaveBeenCalledWith(mockEvent, menuOptions);
-
       expect(mockEvent.preventDefault).toHaveBeenCalled();
       expect(mockEvent.stopPropagation).toHaveBeenCalled();
 
@@ -130,6 +136,13 @@ describe("SourceTreeItem", () => {
           id: "node-menu-blackbox",
           label: "Blackbox source",
         },
+        {
+          accesskey: "d",
+          click: expect.any(Function),
+          disabled: false,
+          id: "node-menu-download-file",
+          label: "Download file",
+        },
       ];
       const mockEvent = {
         preventDefault: jest.fn(),
@@ -153,6 +166,57 @@ describe("SourceTreeItem", () => {
       expect(props.toggleBlackBox).toHaveBeenCalled();
     });
 
+    it("shows context menu on file to download source file", async () => {
+      const menuOptions = [
+        {
+          accesskey: "u",
+          click: expect.any(Function),
+          disabled: false,
+          id: "node-menu-copy-source",
+          label: "Copy source URI",
+        },
+        {
+          accesskey: "B",
+          click: expect.any(Function),
+          disabled: false,
+          id: "node-menu-blackbox",
+          label: "Blackbox source",
+        },
+        {
+          accesskey: "d",
+          click: expect.any(Function),
+          disabled: false,
+          id: "node-menu-download-file",
+          label: "Download file",
+        },
+      ];
+      const mockEvent = {
+        preventDefault: jest.fn(),
+        stopPropagation: jest.fn(),
+      };
+
+      const { props, instance } = render({
+        projectRoot: "root/",
+      });
+      const { item, source } = instance.props;
+
+      instance.handleDownloadFile = jest.fn(() => {});
+
+      await instance.onContextMenu(mockEvent, item, source);
+
+      expect(showMenu).toHaveBeenCalledWith(mockEvent, menuOptions);
+
+      expect(mockEvent.preventDefault).toHaveBeenCalled();
+      expect(mockEvent.stopPropagation).toHaveBeenCalled();
+
+      showMenu.mock.calls[0][1][2].click();
+      expect(props.setProjectDirectoryRoot).not.toHaveBeenCalled();
+      expect(props.clearProjectDirectoryRoot).not.toHaveBeenCalled();
+      expect(props.toggleBlackBox).not.toHaveBeenCalled();
+      expect(copyToTheClipboard).not.toHaveBeenCalled();
+      expect(instance.handleDownloadFile).toHaveBeenCalled();
+    });
+
     it("shows context menu on root to remove directory root", async () => {
       const menuOptions = [
         {
diff --git a/devtools/client/debugger/src/components/PrimaryPanes/tests/__snapshots__/SourcesTreeItem.spec.js.snap b/devtools/client/debugger/src/components/PrimaryPanes/tests/__snapshots__/SourcesTreeItem.spec.js.snap
index 0e8ca3ab3389..cddbb115169a 100644
--- a/devtools/client/debugger/src/components/PrimaryPanes/tests/__snapshots__/SourcesTreeItem.spec.js.snap
+++ b/devtools/client/debugger/src/components/PrimaryPanes/tests/__snapshots__/SourcesTreeItem.spec.js.snap
@@ -38,6 +38,7 @@ Object {
   "instance": SourceTreeItem {
     "addCollapseExpandAllOptions": [Function],
     "context": Object {},
+    "handleDownloadFile": [Function],
     "onClick": [Function],
     "onContextMenu": [Function],
     "props": Object {
@@ -263,6 +264,7 @@ Object {
   "instance": SourceTreeItem {
     "addCollapseExpandAllOptions": [Function],
     "context": Object {},
+    "handleDownloadFile": [Function],
     "onClick": [Function],
     "onContextMenu": [Function],
     "props": Object {
@@ -494,6 +496,7 @@ Object {
   "instance": SourceTreeItem {
     "addCollapseExpandAllOptions": [Function],
     "context": Object {},
+    "handleDownloadFile": [Function],
     "onClick": [Function],
     "onContextMenu": [Function],
     "props": Object {
@@ -708,6 +711,7 @@ Object {
   "instance": SourceTreeItem {
     "addCollapseExpandAllOptions": [Function],
     "context": Object {},
+    "handleDownloadFile": [Function],
     "onClick": [Function],
     "onContextMenu": [Function],
     "props": Object {
@@ -880,6 +884,7 @@ Object {
   "instance": SourceTreeItem {
     "addCollapseExpandAllOptions": [Function],
     "context": Object {},
+    "handleDownloadFile": [Function],
     "onClick": [Function],
     "onContextMenu": [Function],
     "props": Object {
@@ -1055,6 +1060,7 @@ Object {
   "instance": SourceTreeItem {
     "addCollapseExpandAllOptions": [Function],
     "context": Object {},
+    "handleDownloadFile": [Function],
     "onClick": [Function],
     "onContextMenu": [Function],
     "props": Object {
@@ -1198,6 +1204,7 @@ Object {
   "instance": SourceTreeItem {
     "addCollapseExpandAllOptions": [Function],
     "context": Object {},
+    "handleDownloadFile": [Function],
     "onClick": [Function],
     "onContextMenu": [Function],
     "props": Object {
@@ -1367,6 +1374,7 @@ Object {
   "instance": SourceTreeItem {
     "addCollapseExpandAllOptions": [Function],
     "context": Object {},
+    "handleDownloadFile": [Function],
     "onClick": [Function],
     "onContextMenu": [Function],
     "props": Object {
@@ -1504,6 +1512,7 @@ Object {
   "instance": SourceTreeItem {
     "addCollapseExpandAllOptions": [Function],
     "context": Object {},
+    "handleDownloadFile": [Function],
     "onClick": [Function],
     "onContextMenu": [Function],
     "props": Object {
@@ -1647,6 +1656,7 @@ Object {
   "instance": SourceTreeItem {
     "addCollapseExpandAllOptions": [Function],
     "context": Object {},
+    "handleDownloadFile": [Function],
     "onClick": [Function],
     "onContextMenu": [Function],
     "props": Object {
@@ -1819,6 +1829,7 @@ Object {
   "instance": SourceTreeItem {
     "addCollapseExpandAllOptions": [Function],
     "context": Object {},
+    "handleDownloadFile": [Function],
     "onClick": [Function],
     "onContextMenu": [Function],
     "props": Object {
@@ -2000,6 +2011,7 @@ Object {
   "instance": SourceTreeItem {
     "addCollapseExpandAllOptions": [Function],
     "context": Object {},
+    "handleDownloadFile": [Function],
     "onClick": [Function],
     "onContextMenu": [Function],
     "props": Object {
@@ -2223,6 +2235,7 @@ Object {
   "instance": SourceTreeItem {
     "addCollapseExpandAllOptions": [Function],
     "context": Object {},
+    "handleDownloadFile": [Function],
     "onClick": [Function],
     "onContextMenu": [Function],
     "props": Object {
@@ -2449,6 +2462,7 @@ Object {
   "instance": SourceTreeItem {
     "addCollapseExpandAllOptions": [Function],
     "context": Object {},
+    "handleDownloadFile": [Function],
     "onClick": [Function],
     "onContextMenu": [Function],
     "props": Object {