Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

51 files changed, 3568 insertions, 0 deletions

diff --git a/dom/file/tests/common_blob.js b/dom/file/tests/common_blob.js
new file mode 100644
index 0000000000..261909af0d
--- /dev/null
+++ b/dom/file/tests/common_blob.js
@@ -0,0 +1,395 @@
+const RANGE_1 = 1;
+const RANGE_2 = 2;
+
+function testBlob(file, contents, testName) {
+  // Load file using FileReader
+  return (
+    new Promise(resolve => {
+      let r = new FileReader();
+      r.onload = event => {
+        is(
+          event.target.readyState,
+          FileReader.DONE,
+          "[FileReader] readyState in test FileReader.readAsBinaryString of " +
+            testName
+        );
+        is(
+          event.target.error,
+          null,
+          "[FileReader] no error in test FileReader.readAsBinaryString of " +
+            testName
+        );
+        // Do not use |is(event.target.result, contents, "...");| that may output raw binary data.
+        is(
+          event.target.result.length,
+          contents.length,
+          "[FileReader] Length of result in test FileReader.readAsBinaryString of " +
+            testName
+        );
+        ok(
+          event.target.result == contents,
+          "[FileReader] Content of result in test FileReader.readAsBinaryString of " +
+            testName
+        );
+        is(
+          event.lengthComputable,
+          true,
+          "[FileReader] lengthComputable in test FileReader.readAsBinaryString of " +
+            testName
+        );
+        is(
+          event.loaded,
+          contents.length,
+          "[FileReader] Loaded length in test FileReader.readAsBinaryString of " +
+            testName
+        );
+        is(
+          event.total,
+          contents.length,
+          "[FileReader] Total length in test FileReader.readAsBinaryString of " +
+            testName
+        );
+        resolve();
+      };
+      r.readAsBinaryString(file);
+    })
+
+      // Load file using URL.createObjectURL and XMLHttpRequest
+      .then(() => {
+        return new Promise(resolve => {
+          let xhr = new XMLHttpRequest();
+          xhr.open("GET", URL.createObjectURL(file));
+          xhr.onload = event => {
+            XHRLoadHandler(
+              event,
+              resolve,
+              contents,
+              "XMLHttpRequest load of " + testName
+            );
+          };
+          xhr.overrideMimeType("text/plain; charset=x-user-defined");
+          xhr.send();
+        });
+      })
+
+      // Send file to server using FormData and XMLHttpRequest
+      .then(() => {
+        return new Promise(resolve => {
+          let xhr = new XMLHttpRequest();
+          xhr.onload = function (event) {
+            checkMPSubmission(JSON.parse(event.target.responseText), [
+              { name: "hello", value: "world" },
+              {
+                name: "myfile",
+                value: contents,
+                fileName: file.name || "blob",
+                contentType: file.type || "application/octet-stream",
+              },
+            ]);
+            resolve();
+          };
+          xhr.open("POST", "../../../dom/html/test/form_submit_server.sjs");
+
+          let fd = new FormData();
+          fd.append("hello", "world");
+          fd.append("myfile", file);
+
+          xhr.send(fd);
+        });
+      })
+
+      // Send file to server using plain XMLHttpRequest
+      .then(() => {
+        return new Promise(resolve => {
+          let xhr = new XMLHttpRequest();
+          xhr.open("POST", "../../../dom/xhr/tests/file_XHRSendData.sjs");
+
+          xhr.onload = function (event) {
+            is(
+              event.target.getResponseHeader("Result-Content-Type"),
+              file.type ? file.type : null,
+              "request content-type in XMLHttpRequest send of " + testName
+            );
+            is(
+              event.target.getResponseHeader("Result-Content-Length"),
+              String(file.size),
+              "request content-length in XMLHttpRequest send of " + testName
+            );
+          };
+
+          xhr.addEventListener("load", event => {
+            XHRLoadHandler(
+              event,
+              resolve,
+              contents,
+              "XMLHttpRequest send of " + testName
+            );
+          });
+          xhr.overrideMimeType("text/plain; charset=x-user-defined");
+          xhr.send(file);
+        });
+      })
+  );
+}
+
+function testSlice(file, size, type, contents, fileType, range) {
+  is(file.type, type, fileType + " file is correct type");
+  is(file.size, size, fileType + " file is correct size");
+  if (fileType == "fileFile") {
+    ok(file instanceof File, fileType + " file is a File");
+  } else if (fileType == "memFile") {
+    ok(!(file instanceof File), fileType + " file is not a File");
+  }
+  ok(file instanceof Blob, fileType + " file is also a Blob");
+
+  let slice = file.slice(0, size);
+  ok(slice instanceof Blob, fileType + " fullsize slice is a Blob");
+  ok(!(slice instanceof File), fileType + " fullsize slice is not a File");
+
+  slice = file.slice(0, 1234);
+  ok(slice instanceof Blob, fileType + " sized slice is a Blob");
+  ok(!(slice instanceof File), fileType + " sized slice is not a File");
+
+  slice = file.slice(0, size, "foo/bar");
+  is(slice.type, "foo/bar", fileType + " fullsize slice foo/bar type");
+
+  slice = file.slice(0, 5432, "foo/bar");
+  is(slice.type, "foo/bar", fileType + " sized slice foo/bar type");
+
+  is(slice.slice(0, 10).type, "", fileType + " slice-slice type");
+  is(slice.slice(0, 10).size, 10, fileType + " slice-slice size");
+  is(
+    slice.slice(0, 10, "hello/world").type,
+    "hello/world",
+    fileType + " slice-slice hello/world type"
+  );
+  is(
+    slice.slice(0, 10, "hello/world").size,
+    10,
+    fileType + " slice-slice hello/world size"
+  );
+
+  // Start, end, expected size
+  var indexes_range_1 = [
+    [0, size, size],
+    [0, 1234, 1234],
+    [size - 500, size, 500],
+    [size - 500, size + 500, 500],
+    [size + 500, size + 1500, 0],
+    [0, 0, 0],
+    [1000, 1000, 0],
+    [size, size, 0],
+    [undefined, undefined, size],
+    [0, undefined, size],
+  ];
+
+  var indexes_range_2 = [
+    [100, undefined, size - 100],
+    [-100, undefined, 100],
+    [100, -100, size - 200],
+    [-size - 100, undefined, size],
+    [-2 * size - 100, 500, 500],
+    [0, -size - 100, 0],
+    [100, -size - 100, 0],
+    [50, -size + 100, 50],
+    [0, 33000, 33000],
+    [1000, 34000, 33000],
+  ];
+
+  let indexes;
+  if (range == RANGE_1) {
+    indexes = indexes_range_1;
+  } else if (range == RANGE_2) {
+    indexes = indexes_range_2;
+  } else {
+    throw "Invalid range!";
+  }
+
+  function runNextTest() {
+    if (!indexes.length) {
+      return Promise.resolve(true);
+    }
+
+    let index = indexes.shift();
+
+    let sliceContents;
+    let testName;
+    if (index[0] == undefined) {
+      slice = file.slice();
+      sliceContents = contents.slice();
+      testName = fileType + " slice()";
+    } else if (index[1] == undefined) {
+      slice = file.slice(index[0]);
+      sliceContents = contents.slice(index[0]);
+      testName = fileType + " slice(" + index[0] + ")";
+    } else {
+      slice = file.slice(index[0], index[1]);
+      sliceContents = contents.slice(index[0], index[1]);
+      testName = fileType + " slice(" + index[0] + ", " + index[1] + ")";
+    }
+
+    is(slice.type, "", testName + " type");
+    is(slice.size, index[2], testName + " size");
+    is(sliceContents.length, index[2], testName + " data size");
+
+    return testBlob(slice, sliceContents, testName).then(runNextTest);
+  }
+
+  return runNextTest()
+    .then(() => {
+      // Slice of slice
+      let sliceOfSlice = file.slice(0, 40000);
+      return testBlob(
+        sliceOfSlice.slice(5000, 42000),
+        contents.slice(5000, 40000),
+        "file slice slice"
+      );
+    })
+    .then(() => {
+      // ...of slice of slice
+      let sliceOfSlice = file
+        .slice(0, 40000)
+        .slice(5000, 42000)
+        .slice(400, 700);
+      SpecialPowers.gc();
+      return testBlob(
+        sliceOfSlice,
+        contents.slice(5400, 5700),
+        "file slice slice slice"
+      );
+    });
+}
+
+function convertXHRBinary(s) {
+  let res = "";
+  for (let i = 0; i < s.length; ++i) {
+    res += String.fromCharCode(s.charCodeAt(i) & 255);
+  }
+  return res;
+}
+
+function XHRLoadHandler(event, resolve, contents, testName) {
+  is(event.target.readyState, 4, "[XHR] readyState in test " + testName);
+  is(event.target.status, 200, "[XHR] no error in test " + testName);
+  // Do not use |is(convertXHRBinary(event.target.responseText), contents, "...");| that may output raw binary data.
+  let convertedData = convertXHRBinary(event.target.responseText);
+  is(
+    convertedData.length,
+    contents.length,
+    "[XHR] Length of result in test " + testName
+  );
+  ok(convertedData == contents, "[XHR] Content of result in test " + testName);
+  is(
+    event.lengthComputable,
+    event.total != 0,
+    "[XHR] lengthComputable in test " + testName
+  );
+  is(event.loaded, contents.length, "[XHR] Loaded length in test " + testName);
+  is(event.total, contents.length, "[XHR] Total length in test " + testName);
+  resolve();
+}
+
+function checkMPSubmission(sub, expected) {
+  function getPropCount(o) {
+    let x,
+      l = 0;
+    for (x in o) {
+      ++l;
+    }
+    return l;
+  }
+
+  is(sub.length, expected.length, "Correct number of items");
+  let i;
+  for (i = 0; i < expected.length; ++i) {
+    if (!("fileName" in expected[i])) {
+      is(
+        sub[i].headers["Content-Disposition"],
+        'form-data; name="' + expected[i].name + '"',
+        "Correct name (A)"
+      );
+      is(getPropCount(sub[i].headers), 1, "Wrong number of headers (A)");
+    } else {
+      is(
+        sub[i].headers["Content-Disposition"],
+        'form-data; name="' +
+          expected[i].name +
+          '"; filename="' +
+          expected[i].fileName +
+          '"',
+        "Correct name (B)"
+      );
+      is(
+        sub[i].headers["Content-Type"],
+        expected[i].contentType,
+        "Correct content type (B)"
+      );
+      is(getPropCount(sub[i].headers), 2, "Wrong number of headers (B)");
+    }
+    // Do not use |is(sub[i].body, expected[i].value, "...");| that may output raw binary data.
+    is(sub[i].body.length, expected[i].value.length, "Length of correct value");
+    ok(sub[i].body == expected[i].value, "Content of correct value");
+  }
+}
+
+function createCanvasURL() {
+  return new Promise(resolve => {
+    // Create a decent-sized image
+    let cx = $("canvas").getContext("2d");
+    let s = cx.canvas.width;
+    let grad = cx.createLinearGradient(0, 0, s - 1, s - 1);
+    for (i = 0; i < 0.95; i += 0.1) {
+      grad.addColorStop(i, "white");
+      grad.addColorStop(i + 0.05, "black");
+    }
+    grad.addColorStop(1, "white");
+    cx.fillStyle = grad;
+    cx.fillRect(0, 0, s - 1, s - 1);
+    cx.fillStyle = "rgba(200, 0, 0, 0.9)";
+    cx.fillRect(0.1 * s, 0.1 * s, 0.7 * s, 0.7 * s);
+    cx.strokeStyle = "rgba(0, 0, 130, 0.5)";
+    cx.lineWidth = 0.14 * s;
+    cx.beginPath();
+    cx.arc(0.6 * s, 0.6 * s, 0.3 * s, 0, Math.PI * 2, true);
+    cx.stroke();
+    cx.closePath();
+    cx.fillStyle = "rgb(0, 255, 0)";
+    cx.beginPath();
+    cx.arc(0.1 * s, 0.8 * s, 0.1 * s, 0, Math.PI * 2, true);
+    cx.fill();
+    cx.closePath();
+
+    let data = atob(
+      cx.canvas
+        .toDataURL("image/png")
+        .substring("data:text/png;base64,".length + 1)
+    );
+
+    // This might fail if we dramatically improve the png encoder. If that happens
+    // please increase the complexity or size of the image generated above to ensure
+    // that we're testing with files that are large enough.
+    ok(data.length > 65536, "test data sufficiently large");
+
+    resolve(data);
+  });
+}
+
+function createFile(data, name) {
+  return new Promise(resolve => {
+    SpecialPowers.createFiles([{ name, data }], files => {
+      resolve(files[0]);
+    });
+  });
+}
+
+function toBlobPromise(canvas) {
+  function BlobListener(callback, file) {
+    var reader = new FileReader();
+    reader.onload = () => callback(file);
+    reader.readAsDataURL(file);
+  }
+
+  return new Promise(resolve => {
+    canvas.toBlob(BlobListener.bind(undefined, resolve));
+  });
+}
diff --git a/dom/file/tests/common_blob_reading.js b/dom/file/tests/common_blob_reading.js
new file mode 100644
index 0000000000..5df8419a30
--- /dev/null
+++ b/dom/file/tests/common_blob_reading.js
@@ -0,0 +1,50 @@
+async function testBlobText(blob, content) {
+  let text = await blob.text();
+  is(text, content, "blob.text()");
+}
+
+async function testBlobArrayBuffer(blob, content) {
+  let ab = await blob.arrayBuffer();
+  is(ab.byteLength, content.length, "blob.arrayBuffer()");
+}
+
+async function testBlobStream(blob, content) {
+  let s = await blob.stream();
+  ok(s instanceof ReadableStream, "We have a ReadableStream");
+
+  let data = await s.getReader().read();
+  ok(!data.done, "Nothing is done yet");
+  for (let i = 0; i < data.value.length; ++i) {
+    is(String.fromCharCode(data.value[i]), content[i], "blob.stream() - " + i);
+  }
+}
+
+function workify(func, blob, content) {
+  info("Workifying " + func);
+
+  return new Promise((resolve, reject) => {
+    let worker = new Worker("worker_blob_reading.js");
+    worker.postMessage({ func, blob, content });
+    worker.onmessage = function (e) {
+      if (e.data.type == "done") {
+        resolve();
+        return;
+      }
+
+      if (e.data.type == "error") {
+        reject(e.data.message);
+        return;
+      }
+
+      if (e.data.type == "test") {
+        ok(e.data.test, e.data.message);
+        return;
+      }
+
+      if (e.data.type == "info") {
+        info(e.data.message);
+        return;
+      }
+    };
+  });
+}
diff --git a/dom/file/tests/common_blob_types.js b/dom/file/tests/common_blob_types.js
new file mode 100644
index 0000000000..95501e58e5
--- /dev/null
+++ b/dom/file/tests/common_blob_types.js
@@ -0,0 +1,82 @@
+let blobTypes = [
+  {
+    type: "memory",
+    factory: async content => {
+      return new Blob([content]);
+    },
+    blobImplType: "MultipartBlobImpl[StringBlobImpl]",
+  },
+
+  {
+    type: "ipcBlob",
+    factory: async content => {
+      return new Promise(resolve => {
+        let bc1 = new BroadcastChannel("blob tests");
+        bc1.onmessage = e => {
+          resolve(e.data);
+        };
+
+        let bc2 = new BroadcastChannel("blob tests");
+        bc2.postMessage(new Blob([content]));
+      });
+    },
+    blobImplType:
+      "StreamBlobImpl[StreamBlobImpl[MultipartBlobImpl[StringBlobImpl]]]",
+  },
+
+  {
+    type: "memoryBlob",
+    factory: async content => {
+      return new Promise(resolve => {
+        var xhr = new XMLHttpRequest();
+        xhr.open(
+          "POST",
+          "http://mochi.test:8888/browser/dom/xhr/tests/temporaryFileBlob.sjs"
+        );
+        xhr.responseType = "blob";
+        xhr.send(content);
+        xhr.onloadend = _ => {
+          resolve(xhr.response);
+        };
+      });
+    },
+    blobImplType: "MemoryBlobImpl",
+  },
+
+  {
+    type: "temporaryBlob",
+    factory: async content => {
+      await SpecialPowers.pushPrefEnv({
+        set: [["dom.blob.memoryToTemporaryFile", 1]],
+      });
+
+      return new Promise(resolve => {
+        var xhr = new XMLHttpRequest();
+        xhr.open(
+          "POST",
+          "http://mochi.test:8888/browser/dom/xhr/tests/temporaryFileBlob.sjs"
+        );
+        xhr.responseType = "blob";
+        xhr.send(content);
+        xhr.onloadend = _ => {
+          resolve(xhr.response);
+        };
+      });
+    },
+    blobImplType: "StreamBlobImpl[TemporaryFileBlobImpl]",
+  },
+];
+
+async function forEachBlobType(content, cb) {
+  for (let i = 0; i < blobTypes.length; ++i) {
+    info("Running tests for " + blobTypes[i].type);
+    let blob = await blobTypes[i].factory(content);
+    is(
+      SpecialPowers.wrap(blob).blobImplType,
+      blobTypes[i].blobImplType,
+      "Correct blobImplType"
+    );
+    ok(blob instanceof Blob, "Blob created");
+    await cb(blob, content);
+  }
+}
diff --git a/dom/file/tests/common_fileReader.js b/dom/file/tests/common_fileReader.js
new file mode 100644
index 0000000000..9ee6a32b93
--- /dev/null
+++ b/dom/file/tests/common_fileReader.js
@@ -0,0 +1,848 @@
+function test_setup() {
+  return new Promise(resolve => {
+    const minFileSize = 20000;
+
+    // Create strings containing data we'll test with. We'll want long
+    // strings to ensure they span multiple buffers while loading
+    let testTextData = "asd b\tlah\u1234w\u00a0r";
+    while (testTextData.length < minFileSize) {
+      testTextData = testTextData + testTextData;
+    }
+
+    let testASCIIData = "abcdef 123456\n";
+    while (testASCIIData.length < minFileSize) {
+      testASCIIData = testASCIIData + testASCIIData;
+    }
+
+    let testBinaryData = "";
+    for (let i = 0; i < 256; i++) {
+      testBinaryData += String.fromCharCode(i);
+    }
+    while (testBinaryData.length < minFileSize) {
+      testBinaryData = testBinaryData + testBinaryData;
+    }
+
+    let dataurldata0 = testBinaryData.substr(
+      0,
+      testBinaryData.length - (testBinaryData.length % 3)
+    );
+    let dataurldata1 = testBinaryData.substr(
+      0,
+      testBinaryData.length - 2 - (testBinaryData.length % 3)
+    );
+    let dataurldata2 = testBinaryData.substr(
+      0,
+      testBinaryData.length - 1 - (testBinaryData.length % 3)
+    );
+
+    //Set up files for testing
+    let openerURL = SimpleTest.getTestFileURL("fileapi_chromeScript.js");
+    let opener = SpecialPowers.loadChromeScript(openerURL);
+
+    opener.addMessageListener("files.opened", message => {
+      let [
+        asciiFile,
+        binaryFile,
+        nonExistingFile,
+        utf8TextFile,
+        utf16TextFile,
+        emptyFile,
+        dataUrlFile0,
+        dataUrlFile1,
+        dataUrlFile2,
+      ] = message;
+
+      resolve({
+        blobs: {
+          asciiFile,
+          binaryFile,
+          nonExistingFile,
+          utf8TextFile,
+          utf16TextFile,
+          emptyFile,
+          dataUrlFile0,
+          dataUrlFile1,
+          dataUrlFile2,
+        },
+        data: {
+          text: testTextData,
+          ascii: testASCIIData,
+          binary: testBinaryData,
+          url0: dataurldata0,
+          url1: dataurldata1,
+          url2: dataurldata2,
+        },
+      });
+    });
+
+    opener.sendAsyncMessage("files.open", [
+      testASCIIData,
+      testBinaryData,
+      null,
+      convertToUTF8(testTextData),
+      convertToUTF16(testTextData),
+      "",
+      dataurldata0,
+      dataurldata1,
+      dataurldata2,
+    ]);
+  });
+}
+
+function runBasicTests(data) {
+  return test_basic()
+    .then(() => {
+      return test_readAsText(data.blobs.asciiFile, data.data.ascii);
+    })
+    .then(() => {
+      return test_readAsBinaryString(data.blobs.binaryFile, data.data.binary);
+    })
+    .then(() => {
+      return test_readAsArrayBuffer(data.blobs.binaryFile, data.data.binary);
+    });
+}
+
+function runEncodingTests(data) {
+  return test_readAsTextWithEncoding(
+    data.blobs.asciiFile,
+    data.data.ascii,
+    data.data.ascii.length,
+    ""
+  )
+    .then(() => {
+      return test_readAsTextWithEncoding(
+        data.blobs.asciiFile,
+        data.data.ascii,
+        data.data.ascii.length,
+        "iso8859-1"
+      );
+    })
+    .then(() => {
+      return test_readAsTextWithEncoding(
+        data.blobs.utf8TextFile,
+        data.data.text,
+        convertToUTF8(data.data.text).length,
+        "utf8"
+      );
+    })
+    .then(() => {
+      return test_readAsTextWithEncoding(
+        data.blobs.utf16TextFile,
+        data.data.text,
+        convertToUTF16(data.data.text).length,
+        "utf-16"
+      );
+    })
+    .then(() => {
+      return test_readAsTextWithEncoding(data.blobs.emptyFile, "", 0, "");
+    })
+    .then(() => {
+      return test_readAsTextWithEncoding(data.blobs.emptyFile, "", 0, "utf8");
+    })
+    .then(() => {
+      return test_readAsTextWithEncoding(data.blobs.emptyFile, "", 0, "utf-16");
+    });
+}
+
+function runEmptyTests(data) {
+  return test_onlyResult()
+    .then(() => {
+      return test_readAsText(data.blobs.emptyFile, "");
+    })
+    .then(() => {
+      return test_readAsBinaryString(data.blobs.emptyFile, "");
+    })
+    .then(() => {
+      return test_readAsArrayBuffer(data.blobs.emptyFile, "");
+    })
+    .then(() => {
+      return test_readAsDataURL(data.blobs.emptyFile, convertToDataURL(""), 0);
+    });
+}
+
+function runTwiceTests(data) {
+  return test_readAsTextTwice(data.blobs.asciiFile, data.data.ascii)
+    .then(() => {
+      return test_readAsBinaryStringTwice(
+        data.blobs.binaryFile,
+        data.data.binary
+      );
+    })
+    .then(() => {
+      return test_readAsDataURLTwice(
+        data.blobs.binaryFile,
+        convertToDataURL(data.data.binary),
+        data.data.binary.length
+      );
+    })
+    .then(() => {
+      return test_readAsArrayBufferTwice(
+        data.blobs.binaryFile,
+        data.data.binary
+      );
+    })
+    .then(() => {
+      return test_readAsArrayBufferTwice2(
+        data.blobs.binaryFile,
+        data.data.binary
+      );
+    });
+}
+
+function runOtherTests(data) {
+  return test_readAsDataURL_customLength(
+    data.blobs.dataUrlFile0,
+    convertToDataURL(data.data.url0),
+    data.data.url0.length,
+    0
+  )
+    .then(() => {
+      return test_readAsDataURL_customLength(
+        data.blobs.dataUrlFile1,
+        convertToDataURL(data.data.url1),
+        data.data.url1.length,
+        1
+      );
+    })
+    .then(() => {
+      return test_readAsDataURL_customLength(
+        data.blobs.dataUrlFile2,
+        convertToDataURL(data.data.url2),
+        data.data.url2.length,
+        2
+      );
+    })
+    .then(() => {
+      return test_abort(data.blobs.asciiFile);
+    })
+    .then(() => {
+      return test_abort_readAsX(data.blobs.asciiFile, data.data.ascii);
+    })
+    .then(() => {
+      return test_nonExisting(data.blobs.nonExistingFile);
+    });
+}
+
+function convertToUTF16(s) {
+  let res = "";
+  for (let i = 0; i < s.length; ++i) {
+    c = s.charCodeAt(i);
+    res += String.fromCharCode(c & 255, c >>> 8);
+  }
+  return res;
+}
+
+function convertToUTF8(s) {
+  return unescape(encodeURIComponent(s));
+}
+
+function convertToDataURL(s) {
+  return "data:application/octet-stream;base64," + btoa(s);
+}
+
+function loadEventHandler_string(
+  event,
+  resolve,
+  reader,
+  data,
+  dataLength,
+  testName
+) {
+  is(event.target, reader, "Correct target.");
+  is(
+    event.target.readyState,
+    FileReader.DONE,
+    "readyState in test " + testName
+  );
+  is(event.target.error, null, "no error in test " + testName);
+  is(event.target.result, data, "result in test " + testName);
+  is(event.lengthComputable, true, "lengthComputable in test " + testName);
+  is(event.loaded, dataLength, "loaded in test " + testName);
+  is(event.total, dataLength, "total in test " + testName);
+  resolve();
+}
+
+function loadEventHandler_arrayBuffer(event, resolve, reader, data, testName) {
+  is(
+    event.target.readyState,
+    FileReader.DONE,
+    "readyState in test " + testName
+  );
+  is(event.target.error, null, "no error in test " + testName);
+  is(event.lengthComputable, true, "lengthComputable in test " + testName);
+  is(event.loaded, data.length, "loaded in test " + testName);
+  is(event.total, data.length, "total in test " + testName);
+  is(
+    event.target.result.byteLength,
+    data.length,
+    "array buffer size in test " + testName
+  );
+
+  let u8v = new Uint8Array(event.target.result);
+  is(
+    String.fromCharCode.apply(String, u8v),
+    data,
+    "array buffer contents in test " + testName
+  );
+  u8v = null;
+
+  if ("SpecialPowers" in self) {
+    SpecialPowers.gc();
+
+    is(
+      event.target.result.byteLength,
+      data.length,
+      "array buffer size after gc in test " + testName
+    );
+    u8v = new Uint8Array(event.target.result);
+    is(
+      String.fromCharCode.apply(String, u8v),
+      data,
+      "array buffer contents after gc in test " + testName
+    );
+  }
+
+  resolve();
+}
+
+function test_basic() {
+  return new Promise(resolve => {
+    is(FileReader.EMPTY, 0, "correct EMPTY value");
+    is(FileReader.LOADING, 1, "correct LOADING value");
+    is(FileReader.DONE, 2, "correct DONE value");
+    resolve();
+  });
+}
+
+function test_readAsText(blob, text) {
+  return new Promise(resolve => {
+    let onloadHasRun = false;
+    let onloadStartHasRun = false;
+
+    let r = new FileReader();
+    is(r.readyState, FileReader.EMPTY, "correct initial text readyState");
+
+    r.onload = event => {
+      loadEventHandler_string(
+        event,
+        resolve,
+        r,
+        text,
+        text.length,
+        "readAsText"
+      );
+    };
+
+    r.addEventListener("load", () => {
+      onloadHasRun = true;
+    });
+    r.addEventListener("loadstart", () => {
+      onloadStartHasRun = true;
+    });
+
+    r.readAsText(blob);
+
+    is(r.readyState, FileReader.LOADING, "correct loading text readyState");
+    is(onloadHasRun, false, "text loading must be async");
+    is(onloadStartHasRun, false, "text loadstart should fire async");
+  });
+}
+
+function test_readAsBinaryString(blob, text) {
+  return new Promise(resolve => {
+    let onloadHasRun = false;
+    let onloadStartHasRun = false;
+
+    let r = new FileReader();
+    is(r.readyState, FileReader.EMPTY, "correct initial binary readyState");
+
+    r.addEventListener("load", function () {
+      onloadHasRun = true;
+    });
+    r.addEventListener("loadstart", function () {
+      onloadStartHasRun = true;
+    });
+
+    r.readAsBinaryString(blob);
+
+    r.onload = event => {
+      loadEventHandler_string(
+        event,
+        resolve,
+        r,
+        text,
+        text.length,
+        "readAsBinaryString"
+      );
+    };
+
+    is(r.readyState, FileReader.LOADING, "correct loading binary readyState");
+    is(onloadHasRun, false, "binary loading must be async");
+    is(onloadStartHasRun, false, "binary loadstart should fire async");
+  });
+}
+
+function test_readAsArrayBuffer(blob, text) {
+  return new Promise(resolve => {
+    let onloadHasRun = false;
+    let onloadStartHasRun = false;
+
+    r = new FileReader();
+    is(
+      r.readyState,
+      FileReader.EMPTY,
+      "correct initial arrayBuffer readyState"
+    );
+
+    r.addEventListener("load", function () {
+      onloadHasRun = true;
+    });
+    r.addEventListener("loadstart", function () {
+      onloadStartHasRun = true;
+    });
+
+    r.readAsArrayBuffer(blob);
+
+    r.onload = event => {
+      loadEventHandler_arrayBuffer(
+        event,
+        resolve,
+        r,
+        text,
+        "readAsArrayBuffer"
+      );
+    };
+
+    is(
+      r.readyState,
+      FileReader.LOADING,
+      "correct loading arrayBuffer readyState"
+    );
+    is(onloadHasRun, false, "arrayBuffer loading must be async");
+    is(onloadStartHasRun, false, "arrayBuffer loadstart should fire sync");
+  });
+}
+
+// Test a variety of encodings, and make sure they work properly
+function test_readAsTextWithEncoding(blob, text, length, charset) {
+  return new Promise(resolve => {
+    let r = new FileReader();
+    r.onload = event => {
+      loadEventHandler_string(
+        event,
+        resolve,
+        r,
+        text,
+        length,
+        "readAsText-" + charset
+      );
+    };
+    r.readAsText(blob, charset);
+  });
+}
+
+// Test get result without reading
+function test_onlyResult() {
+  return new Promise(resolve => {
+    let r = new FileReader();
+    is(
+      r.readyState,
+      FileReader.EMPTY,
+      "readyState in test reader get result without reading"
+    );
+    is(r.error, null, "no error in test reader get result without reading");
+    is(r.result, null, "result in test reader get result without reading");
+    resolve();
+  });
+}
+
+function test_readAsDataURL(blob, text, length) {
+  return new Promise(resolve => {
+    let r = new FileReader();
+    r.onload = event => {
+      loadEventHandler_string(event, resolve, r, text, length, "readAsDataURL");
+    };
+    r.readAsDataURL(blob);
+  });
+}
+
+// Test reusing a FileReader to read multiple times
+function test_readAsTextTwice(blob, text) {
+  return new Promise(resolve => {
+    let r = new FileReader();
+    r.onload = event => {
+      loadEventHandler_string(
+        event,
+        () => {},
+        r,
+        text,
+        text.length,
+        "readAsText-reused-once"
+      );
+    };
+
+    let anotherListener = event => {
+      let r1 = event.target;
+      r1.removeEventListener("load", anotherListener);
+      r1.onload = evt => {
+        loadEventHandler_string(
+          evt,
+          resolve,
+          r1,
+          text,
+          text.length,
+          "readAsText-reused-twice"
+        );
+      };
+      r1.readAsText(blob);
+    };
+
+    r.addEventListener("load", anotherListener);
+    r.readAsText(blob);
+  });
+}
+
+// Test reusing a FileReader to read multiple times
+function test_readAsBinaryStringTwice(blob, text) {
+  return new Promise(resolve => {
+    let r = new FileReader();
+    r.onload = event => {
+      loadEventHandler_string(
+        event,
+        () => {},
+        r,
+        text,
+        text.length,
+        "readAsBinaryString-reused-once"
+      );
+    };
+
+    let anotherListener = event => {
+      let r1 = event.target;
+      r1.removeEventListener("load", anotherListener);
+      r1.onload = evt => {
+        loadEventHandler_string(
+          evt,
+          resolve,
+          r1,
+          text,
+          text.length,
+          "readAsBinaryString-reused-twice"
+        );
+      };
+      r1.readAsBinaryString(blob);
+    };
+
+    r.addEventListener("load", anotherListener);
+    r.readAsBinaryString(blob);
+  });
+}
+
+function test_readAsDataURLTwice(blob, text, length) {
+  return new Promise(resolve => {
+    let r = new FileReader();
+    r.onload = event => {
+      loadEventHandler_string(
+        event,
+        () => {},
+        r,
+        text,
+        length,
+        "readAsDataURL-reused-once"
+      );
+    };
+
+    let anotherListener = event => {
+      let r1 = event.target;
+      r1.removeEventListener("load", anotherListener);
+      r1.onload = evt => {
+        loadEventHandler_string(
+          evt,
+          resolve,
+          r1,
+          text,
+          length,
+          "readAsDataURL-reused-twice"
+        );
+      };
+      r1.readAsDataURL(blob);
+    };
+
+    r.addEventListener("load", anotherListener);
+    r.readAsDataURL(blob);
+  });
+}
+
+function test_readAsArrayBufferTwice(blob, text) {
+  return new Promise(resolve => {
+    let r = new FileReader();
+    r.onload = event => {
+      loadEventHandler_arrayBuffer(
+        event,
+        () => {},
+        r,
+        text,
+        "readAsArrayBuffer-reused-once"
+      );
+    };
+
+    let anotherListener = event => {
+      let r1 = event.target;
+      r1.removeEventListener("load", anotherListener);
+      r1.onload = evt => {
+        loadEventHandler_arrayBuffer(
+          evt,
+          resolve,
+          r1,
+          text,
+          "readAsArrayBuffer-reused-twice"
+        );
+      };
+      r1.readAsArrayBuffer(blob);
+    };
+
+    r.addEventListener("load", anotherListener);
+    r.readAsArrayBuffer(blob);
+  });
+}
+
+// Test first reading as ArrayBuffer then read as something else (BinaryString)
+// and doesn't crash
+function test_readAsArrayBufferTwice2(blob, text) {
+  return new Promise(resolve => {
+    let r = new FileReader();
+    r.onload = event => {
+      loadEventHandler_arrayBuffer(
+        event,
+        () => {},
+        r,
+        text,
+        "readAsArrayBuffer-reused-once2"
+      );
+    };
+
+    let anotherListener = event => {
+      let r1 = event.target;
+      r1.removeEventListener("load", anotherListener);
+      r1.onload = evt => {
+        loadEventHandler_string(
+          evt,
+          resolve,
+          r1,
+          text,
+          text.length,
+          "readAsArrayBuffer-reused-twice2"
+        );
+      };
+      r1.readAsBinaryString(blob);
+    };
+
+    r.addEventListener("load", anotherListener);
+    r.readAsArrayBuffer(blob);
+  });
+}
+
+function test_readAsDataURL_customLength(blob, text, length, numb) {
+  return new Promise(resolve => {
+    is(length % 3, numb, "Want to test data with length %3 == " + numb);
+    let r = new FileReader();
+    r.onload = event => {
+      loadEventHandler_string(
+        event,
+        resolve,
+        r,
+        text,
+        length,
+        "dataurl reading, %3 = " + numb
+      );
+    };
+    r.readAsDataURL(blob);
+  });
+}
+
+// Test abort()
+function test_abort(blob) {
+  return new Promise(resolve => {
+    let abortHasRun = false;
+    let loadEndHasRun = false;
+
+    let r = new FileReader();
+
+    r.onabort = function (event) {
+      is(abortHasRun, false, "abort should only fire once");
+      is(loadEndHasRun, false, "loadend shouldn't have fired yet");
+      abortHasRun = true;
+      is(
+        event.target.readyState,
+        FileReader.DONE,
+        "should be DONE while firing onabort"
+      );
+      is(
+        event.target.error.name,
+        "AbortError",
+        "error set to AbortError for aborted reads"
+      );
+      is(
+        event.target.result,
+        null,
+        "file data should be null on aborted reads"
+      );
+    };
+
+    r.onloadend = function (event) {
+      is(abortHasRun, true, "abort should fire before loadend");
+      is(loadEndHasRun, false, "loadend should only fire once");
+      loadEndHasRun = true;
+      is(
+        event.target.readyState,
+        FileReader.DONE,
+        "should be DONE while firing onabort"
+      );
+      is(
+        event.target.error.name,
+        "AbortError",
+        "error set to AbortError for aborted reads"
+      );
+      is(
+        event.target.result,
+        null,
+        "file data should be null on aborted reads"
+      );
+    };
+
+    r.onload = function () {
+      ok(false, "load should not fire for aborted reads");
+    };
+    r.onerror = function () {
+      ok(false, "error should not fire for aborted reads");
+    };
+    r.onprogress = function () {
+      ok(false, "progress should not fire for aborted reads");
+    };
+
+    let abortThrew = false;
+    try {
+      r.abort();
+    } catch (e) {
+      abortThrew = true;
+    }
+
+    is(abortThrew, false, "abort() doesn't throw");
+    is(abortHasRun, false, "abort() is a no-op unless loading");
+
+    r.readAsText(blob);
+    r.abort();
+
+    is(abortHasRun, true, "abort should fire sync");
+    is(loadEndHasRun, true, "loadend should fire sync");
+
+    resolve();
+  });
+}
+
+// Test calling readAsX to cause abort()
+function test_abort_readAsX(blob, text) {
+  return new Promise(resolve => {
+    let reuseAbortHasRun = false;
+
+    let r = new FileReader();
+    r.onabort = function (event) {
+      is(reuseAbortHasRun, false, "abort should only fire once");
+      reuseAbortHasRun = true;
+      is(
+        event.target.readyState,
+        FileReader.DONE,
+        "should be DONE while firing onabort"
+      );
+      is(
+        event.target.error.name,
+        "AbortError",
+        "error set to AbortError for aborted reads"
+      );
+      is(
+        event.target.result,
+        null,
+        "file data should be null on aborted reads"
+      );
+    };
+    r.onload = function () {
+      ok(false, "load should fire for nested reads");
+    };
+
+    let abortThrew = false;
+    try {
+      r.abort();
+    } catch (e) {
+      abortThrew = true;
+    }
+
+    is(abortThrew, false, "abort() should not throw");
+    is(reuseAbortHasRun, false, "abort() is a no-op unless loading");
+    r.readAsText(blob);
+
+    let readThrew = false;
+    try {
+      r.readAsText(blob);
+    } catch (e) {
+      readThrew = true;
+    }
+
+    is(readThrew, true, "readAsText() must throw if loading");
+    is(reuseAbortHasRun, false, "abort should not fire");
+
+    r.onload = event => {
+      loadEventHandler_string(
+        event,
+        resolve,
+        r,
+        text,
+        text.length,
+        "reuse-as-abort reading"
+      );
+    };
+  });
+}
+
+// Test reading from nonexistent files
+function test_nonExisting(blob) {
+  return new Promise(resolve => {
+    let r = new FileReader();
+
+    r.onerror = function (event) {
+      is(
+        event.target.readyState,
+        FileReader.DONE,
+        "should be DONE while firing onerror"
+      );
+      is(
+        event.target.error.name,
+        "NotFoundError",
+        "error set to NotFoundError for nonexistent files"
+      );
+      is(
+        event.target.result,
+        null,
+        "file data should be null on aborted reads"
+      );
+      resolve();
+    };
+    r.onload = function (event) {
+      is(false, "nonexistent file shouldn't load! (FIXME: bug 1122788)");
+    };
+
+    let didThrow = false;
+    try {
+      r.readAsDataURL(blob);
+    } catch (ex) {
+      didThrow = true;
+    }
+
+    // Once this test passes, we should test that onerror gets called and
+    // that the FileReader object is in the right state during that call.
+    is(
+      didThrow,
+      false,
+      "shouldn't throw when opening nonexistent file, should fire error instead"
+    );
+  });
+}
diff --git a/dom/file/tests/crashtests/1480354.html b/dom/file/tests/crashtests/1480354.html
new file mode 100644
index 0000000000..19e53bb1ca
--- /dev/null
+++ b/dom/file/tests/crashtests/1480354.html
@@ -0,0 +1,14 @@
+<html>
+<body>
+  <script>
+function createBlob(blocksize) {
+  var blob = new Blob();
+  while (blob.size < 25 * 1024 * 1024) { // 25 MB
+    blob = new Blob([blob, new Uint8Array(blocksize)]);
+  }
+  URL.createObjectURL(blob);
+}
+createBlob(1024 * 25);
+  </script>
+</body>
+</html>
diff --git a/dom/file/tests/crashtests/1562891.html b/dom/file/tests/crashtests/1562891.html
new file mode 100644
index 0000000000..fff7606a8a
--- /dev/null
+++ b/dom/file/tests/crashtests/1562891.html
@@ -0,0 +1,16 @@
+<html>
+<head>
+  <script>
+    function start () {
+      const canvas = document.createElementNS('http://www.w3.org/1999/xhtml', 'canvas')
+      SpecialPowers.forceGC();
+      canvas.toBlob(function (blob) {
+        blob.stream()
+        blob.arrayBuffer().then(() => {})
+      })
+    }
+
+    window.addEventListener('load', start)
+  </script>
+</head>
+</html>
diff --git a/dom/file/tests/crashtests/1747185.html b/dom/file/tests/crashtests/1747185.html
new file mode 100644
index 0000000000..89af55504f
--- /dev/null
+++ b/dom/file/tests/crashtests/1747185.html
@@ -0,0 +1,11 @@
+<html>
+<head>
+  <script>
+    window.addEventListener('load', () => {
+      let a = new Blob([new Uint8Array(2147483647)])
+      let b = new File([a], '')
+      b.stream()
+    })
+  </script>
+</head>
+</html>
diff --git a/dom/file/tests/crashtests/1748342.html b/dom/file/tests/crashtests/1748342.html
new file mode 100644
index 0000000000..5f0811b5bb
--- /dev/null
+++ b/dom/file/tests/crashtests/1748342.html
@@ -0,0 +1,26 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <script id="worker1" type="javascript/worker">
+    self.onmessage = async function (e) {
+      self.close()
+      const reader = new FileReader()
+      for (let i = 0; i < 25; i++) {
+        try { reader.readAsBinaryString(e.data[0]) } catch (e) {}
+      }
+      reader.addEventListener("progress", () => {}, {})
+    }
+  </script>
+  <script>
+    window.addEventListener("load", () => {
+      const script = new Blob([document.querySelector("#worker1").textContent], { type: "text/javascript" })
+      const worker = new Worker(window.URL.createObjectURL(script))
+      const data = new Blob(["70𯸟\nℽ㮼٠𛪇\0𛃧كe۰҅妽󠶖󠙻𝅧𡴶𝌋쮁偵9󠰾󠋼7\r𐇽0🥂.\b፟+⍳፟D󠢪3𣚽󠜎🐾�c_߰a<<=𝅦9𝆭𛰅9󠵼ௌ󠌌𖓄ΐ0�⡖‑뢈/-᭰*٠٪᷁e �𯯐𯬓𯕏‫‑걢V*=­￿**󠛐\u2028שּׁ&‭0󠄯𒡯e\n𛰵󠥿⁤𫍰,󠶒𝅥t\nl𧶈a𦜠09k𯔆䴋�|󠄷🦻𛝫󠁥𖭄", "*𒗬۰0\u2029‌/\n\r+󠎔𖼣k*=🿹𯀊\r٪\r󠳐𝲍慑B�\r󠮱\r\n\"\r\\𯉆۹c卑4󠣰󠻬鴗ꛌ\0⌕:\r\n𝚨9ꛅ٠󠃭𯋾\nJ󠯲9\rﾞ鈷P\u2029҉󠷒۹e \b緁︡𤆥^𯏂゚੿|٫󠕉揅ᷛ𩊜s𯑳2凅9c8H𦰤-\f%٠𨮫󠚵‑2𫈮P𝋄窥57\n-゙҄H󠭗𯪞𣃂-ᷢשּׁ貌솽|𝉃‬c㙡𯐉᭯mL\r"], {
+        "type": "image/png",
+        "endings": "transparent"
+      })
+      worker.postMessage([data], [])
+    })
+  </script>
+</head>
+</html>
diff --git a/dom/file/tests/crashtests/crashtests.list b/dom/file/tests/crashtests/crashtests.list
new file mode 100644
index 0000000000..22eec1962e
--- /dev/null
+++ b/dom/file/tests/crashtests/crashtests.list
@@ -0,0 +1,4 @@
+skip-if(ThreadSanitizer) load 1480354.html
+load 1562891.html
+skip-if(Android||ThreadSanitizer) load 1747185.html # Crashes on Android, times out on TSan.
+load 1748342.html
diff --git a/dom/file/tests/create_file_objects.js b/dom/file/tests/create_file_objects.js
new file mode 100644
index 0000000000..cf016b239d
--- /dev/null
+++ b/dom/file/tests/create_file_objects.js
@@ -0,0 +1,19 @@
+/* eslint-env mozilla/chrome-script */
+
+Cu.importGlobalProperties(["File"]);
+
+addMessageListener("create-file-objects", function (message) {
+  let files = [];
+  let promises = [];
+  for (fileName of message.fileNames) {
+    promises.push(
+      File.createFromFileName(fileName).then(function (file) {
+        files.push(file);
+      })
+    );
+  }
+
+  Promise.all(promises).then(function () {
+    sendAsyncMessage("created-file-objects", files);
+  });
+});
diff --git a/dom/file/tests/file_blobURL_expiring.html b/dom/file/tests/file_blobURL_expiring.html
new file mode 100644
index 0000000000..a1ae725709
--- /dev/null
+++ b/dom/file/tests/file_blobURL_expiring.html
@@ -0,0 +1,4 @@
+<script>
+var blob = new Blob([123]);
+parent.postMessage(URL.createObjectURL(blob), "*");
+</script>
diff --git a/dom/file/tests/file_mozfiledataurl_audio.ogg b/dom/file/tests/file_mozfiledataurl_audio.ogg
new file mode 100644
index 0000000000..88b2c1b5b2
--- /dev/null
+++ b/dom/file/tests/file_mozfiledataurl_audio.ogg
diff --git a/dom/file/tests/file_mozfiledataurl_doc.html b/dom/file/tests/file_mozfiledataurl_doc.html
new file mode 100644
index 0000000000..763b20a0f9
--- /dev/null
+++ b/dom/file/tests/file_mozfiledataurl_doc.html
@@ -0,0 +1,6 @@
+<!doctype html>
+<html>
+<body>
+<p>This here is a document!</p>
+<img id=img src="file_mozfiledataurl_img.jpg">
+</html>
diff --git a/dom/file/tests/file_mozfiledataurl_img.jpg b/dom/file/tests/file_mozfiledataurl_img.jpg
new file mode 100644
index 0000000000..dcd99b9670
--- /dev/null
+++ b/dom/file/tests/file_mozfiledataurl_img.jpg
diff --git a/dom/file/tests/file_mozfiledataurl_inner.html b/dom/file/tests/file_mozfiledataurl_inner.html
new file mode 100644
index 0000000000..a2e539bef7
--- /dev/null
+++ b/dom/file/tests/file_mozfiledataurl_inner.html
@@ -0,0 +1,76 @@
+<!doctype html>
+<html>
+<script type="application/javascript">
+var img;
+var audio;
+var iframe;
+
+addEventListener("message", function(e) {
+  mess = JSON.parse(e.data);
+  
+  if ("img" in mess)
+    img.src = mess.img;
+  else if ("audio" in mess)
+    audio.src = mess.audio
+  else if ("iframe" in mess)
+    iframe.src = mess.iframe;
+  else if ("xhr" in mess) {
+    let xhr = new XMLHttpRequest();
+    xhr.onerror = function() {
+      sendItUp({ didError: true });
+    }
+    xhr.onload = function() {
+      sendItUp({ text: xhr.responseText });
+    }
+    try {
+      xhr.open("GET", mess.xhr);
+      xhr.send();
+    }
+    catch (ex) {
+      sendItUp({ didThrow: true });
+    }
+  }
+
+}, false);
+
+function sendItUp(obj) {
+  window.parent.postMessage(JSON.stringify(obj), "*");
+}
+
+function audioNotifyParent(e) {
+  sendItUp({ type: e.type });
+}
+
+function imgNotifyParent(e) {
+  sendItUp({ type: e.type,
+             width: e.target.width,
+             height: e.target.height });
+}
+
+function iframeNotifyParent(e) {
+  res = { type: e.type };
+  try {
+    res.text = e.target.contentDocument.getElementsByTagName("p")[0].textContent;
+  } catch (ex) {}
+  try {
+    res.imgWidth = e.target.contentDocument.getElementById("img").width;
+  } catch (ex) {}
+
+  sendItUp(res);
+}
+
+onload = function() {
+  img = document.getElementById('img');
+  img.onerror = img.onload = imgNotifyParent;
+  iframe = document.getElementById('iframe');
+  iframe.onerror = iframe.onload = iframeNotifyParent;
+  audio = document.getElementById('audio');
+  audio.onerror = audio.onloadeddata = audioNotifyParent;
+}
+
+</script>
+<body>
+<img id=img>
+<audio id=audio>
+<iframe id=iframe></iframe>
+</html>
diff --git a/dom/file/tests/file_mozfiledataurl_text.txt b/dom/file/tests/file_mozfiledataurl_text.txt
new file mode 100644
index 0000000000..315338aa9b
--- /dev/null
+++ b/dom/file/tests/file_mozfiledataurl_text.txt
@@ -0,0 +1 @@
+Yarr, here be plaintext file, ya landlubber
diff --git a/dom/file/tests/file_nonascii_blob_url.html b/dom/file/tests/file_nonascii_blob_url.html
new file mode 100644
index 0000000000..89183f4613
--- /dev/null
+++ b/dom/file/tests/file_nonascii_blob_url.html
@@ -0,0 +1,24 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Test blob URL for non-ascii domain</title>
+</head>
+<body>
+  <p id="result"></p>
+  <script type="application/javascript">
+
+window.onmessage = function(e) {
+  var blob = new Blob([e.data]);
+  var url = URL.createObjectURL(blob);
+
+  var xhr = new XMLHttpRequest();
+  xhr.open('GET', url, false);
+  xhr.send(null);
+
+  parent.postMessage(xhr.responseText, '*');
+}
+
+  </script>
+</body>
+</html>
diff --git a/dom/file/tests/fileapi_chromeScript.js b/dom/file/tests/fileapi_chromeScript.js
new file mode 100644
index 0000000000..f94b01698b
--- /dev/null
+++ b/dom/file/tests/fileapi_chromeScript.js
@@ -0,0 +1,54 @@
+/* eslint-env mozilla/chrome-script */
+
+Cu.importGlobalProperties(["File"]);
+
+function createFileWithData(fileData) {
+  var willDelete = fileData === null;
+
+  var dirSvc = Cc["@mozilla.org/file/directory_service;1"].getService(
+    Ci.nsIProperties
+  );
+
+  var testFile = dirSvc.get("ProfD", Ci.nsIFile);
+  testFile.append("fileAPItestfile");
+  testFile.createUnique(Ci.nsIFile.NORMAL_FILE_TYPE, 0o600);
+
+  var outStream = Cc[
+    "@mozilla.org/network/file-output-stream;1"
+  ].createInstance(Ci.nsIFileOutputStream);
+  outStream.init(
+    testFile,
+    0x02 | 0x08 | 0x20, // write, create, truncate
+    0o666,
+    0
+  );
+  if (willDelete) {
+    fileData = "some irrelevant test data\n";
+  }
+  outStream.write(fileData, fileData.length);
+  outStream.close();
+  return File.createFromNsIFile(testFile).then(domFile => {
+    if (willDelete) {
+      testFile.remove(/* recursive: */ false);
+    }
+
+    return domFile;
+  });
+}
+
+addMessageListener("files.open", function (message) {
+  let promises = [];
+  let list = [];
+
+  for (let fileData of message) {
+    promises.push(
+      createFileWithData(fileData).then(domFile => {
+        list.push(domFile);
+      })
+    );
+  }
+
+  Promise.all(promises).then(() => {
+    sendAsyncMessage("files.opened", list);
+  });
+});
diff --git a/dom/file/tests/mochitest.ini b/dom/file/tests/mochitest.ini
new file mode 100644
index 0000000000..495c0263d8
--- /dev/null
+++ b/dom/file/tests/mochitest.ini
@@ -0,0 +1,54 @@
+[DEFAULT]
+support-files =
+  common_blob.js
+  create_file_objects.js
+  common_fileReader.js
+  common_blob_types.js
+  file_blobURL_expiring.html
+  file_mozfiledataurl_img.jpg
+  file_mozfiledataurl_audio.ogg
+  file_mozfiledataurl_doc.html
+  file_mozfiledataurl_text.txt
+  file_mozfiledataurl_inner.html
+  file_nonascii_blob_url.html
+  fileapi_chromeScript.js
+  worker_fileReader.js
+  !/dom/html/test/form_submit_server.sjs
+  !/dom/xhr/tests/file_XHRSendData.sjs
+  !/dom/xhr/tests/temporaryFileBlob.sjs
+
+[test_blob_fragment_and_query.html]
+[test_blobconstructor.html]
+[test_blobURL_expiring.html]
+[test_file_from_blob.html]
+[test_nonascii_blob_url.html]
+skip-if =
+  http3
+[test_file_negative_date.html]
+[test_fileapi_basic.html]
+[test_fileapi_encoding.html]
+[test_fileapi_twice.html]
+[test_fileapi_other.html]
+[test_fileapi_basic_worker.html]
+[test_fileapi_encoding_worker.html]
+[test_fileapi_twice_worker.html]
+[test_fileapi_other_worker.html]
+[test_fileapi_slice_realFile_1.html]
+[test_fileapi_slice_realFile_2.html]
+skip-if = (verify && !debug && (os == 'win'))
+[test_fileapi_slice_memFile_1.html]
+[test_fileapi_slice_memFile_2.html]
+[test_fileapi_slice_image.html]
+[test_mozfiledataurl.html]
+skip-if =
+  toolkit == 'android' #TIMED_OUT
+  http3
+[test_bug1507893.html]
+support-files = worker_bug1507893.js
+[test_bug1742540.html]
+support-files = worker_bug1742540.js
+skip-if = toolkit == 'android' #TIMED_OUT
+[test_blob_reading.html]
+support-files = common_blob_reading.js worker_blob_reading.js
+skip-if =
+  http3
diff --git a/dom/file/tests/test_agentcluster_bloburl.js b/dom/file/tests/test_agentcluster_bloburl.js
new file mode 100644
index 0000000000..2a577116a2
--- /dev/null
+++ b/dom/file/tests/test_agentcluster_bloburl.js
@@ -0,0 +1,170 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+const { CookieXPCShellUtils } = ChromeUtils.importESModule(
+  "resource://testing-common/CookieXPCShellUtils.sys.mjs"
+);
+
+CookieXPCShellUtils.init(this);
+
+// Same agent cluster, all works fine: blobURLs can be opened.
+add_task(async () => {
+  do_get_profile();
+
+  // CookieXPCShellUtils.createServer does not support https
+  Services.prefs.setBoolPref("dom.security.https_first", false);
+
+  Services.prefs.setBoolPref(
+    "privacy.partition.bloburl_per_agent_cluster",
+    true
+  );
+
+  const server = CookieXPCShellUtils.createServer({ hosts: ["example.org"] });
+
+  let result = new Promise(resolve => {
+    server.registerPathHandler("/result", (metadata, response) => {
+      resolve(metadata.queryString == "ok");
+
+      const body = "Done";
+      response.bodyOutputStream.write(body, body.length);
+    });
+  });
+
+  server.registerPathHandler("/test", (metadata, response) => {
+    response.setStatusLine(metadata.httpVersion, 200, "OK");
+    response.setHeader("Content-Type", "text/html", false);
+    const body = `<script>
+      let b = new Blob(["Hello world!"]);
+      let u = URL.createObjectURL(b);
+      fetch(u).then(r => r.text()).then(t => {
+         if (t !== "Hello world!") {
+           throw new Error(42);
+         }
+      }).then(() => fetch("/result?ok"), () => fetch("/result?failure")).then(() => {});
+    </script>`;
+    response.bodyOutputStream.write(body, body.length);
+  });
+
+  let contentPage = await CookieXPCShellUtils.loadContentPage(
+    "http://example.org/test"
+  );
+
+  Assert.ok(await result, "BlobURL works");
+  await contentPage.close();
+});
+
+// Same agent cluster: frames
+add_task(async () => {
+  do_get_profile();
+
+  // CookieXPCShellUtils.createServer does not support https
+  Services.prefs.setBoolPref("dom.security.https_first", false);
+
+  const server = CookieXPCShellUtils.createServer({ hosts: ["example.org"] });
+
+  let result = new Promise(resolve => {
+    server.registerPathHandler("/result", (metadata, response) => {
+      resolve(metadata.queryString == "ok");
+
+      const body = "Done";
+      response.bodyOutputStream.write(body, body.length);
+    });
+  });
+
+  server.registerPathHandler("/iframe", (metadata, response) => {
+    response.setStatusLine(metadata.httpVersion, 200, "OK");
+    response.setHeader("Content-Type", "text/html", false);
+    const body = `<script>
+      fetch("${metadata.queryString}").then(r => r.text()).then(t => {
+         if (t !== "Hello world!") {
+           throw new Error(42);
+         }
+      }).then(() => fetch("/result?ok"), () => fetch("/result?failure")).then(() => {});
+    </script>`;
+    response.bodyOutputStream.write(body, body.length);
+  });
+
+  server.registerPathHandler("/test", (metadata, response) => {
+    response.setStatusLine(metadata.httpVersion, 200, "OK");
+    response.setHeader("Content-Type", "text/html", false);
+    const body = `<iframe id="a"></iframe><script>
+      let b = new Blob(["Hello world!"]);
+      let u = URL.createObjectURL(b);
+      document.getElementById("a").src = "/iframe?" + u;
+    </script>`;
+    response.bodyOutputStream.write(body, body.length);
+  });
+
+  let contentPage = await CookieXPCShellUtils.loadContentPage(
+    "http://example.org/test"
+  );
+
+  Assert.ok(await result, "BlobURL works");
+  await contentPage.close();
+});
+
+// Cross agent cluster: different tabs
+add_task(async () => {
+  do_get_profile();
+
+  const server = CookieXPCShellUtils.createServer({ hosts: ["example.org"] });
+
+  let result = new Promise(resolve => {
+    server.registerPathHandler("/result", (metadata, response) => {
+      resolve(metadata.queryString == "ok");
+
+      const body = "Done";
+      response.bodyOutputStream.write(body, body.length);
+    });
+  });
+
+  const step = new Promise(resolve => {
+    server.registerPathHandler("/step", (metadata, response) => {
+      resolve(metadata.queryString);
+      response.setStatusLine(metadata.httpVersion, 200, "OK");
+      response.setHeader("Content-Type", "text/html", false);
+      const body = "Thanks!";
+      response.bodyOutputStream.write(body, body.length);
+    });
+  });
+
+  server.registerPathHandler("/test", (metadata, response) => {
+    response.setStatusLine(metadata.httpVersion, 200, "OK");
+    response.setHeader("Content-Type", "text/html", false);
+    const body = `<script>
+      let b = new Blob(["Hello world!"]);
+      let u = URL.createObjectURL(b);
+      fetch("/step?" + u).then(() => {});
+    </script>`;
+    response.bodyOutputStream.write(body, body.length);
+  });
+
+  let contentPage = await CookieXPCShellUtils.loadContentPage(
+    "http://example.org/test"
+  );
+
+  const blobURL = await step;
+  Assert.ok(blobURL.length, "We have a blobURL");
+
+  server.registerPathHandler("/cross-test", (metadata, response) => {
+    response.setStatusLine(metadata.httpVersion, 200, "OK");
+    response.setHeader("Content-Type", "text/html", false);
+    const body = `<script>
+      fetch("${metadata.queryString}").then(r => r.text()).then(t => {
+         if (t !== "Hello world!") {
+           throw new Error(42);
+         }
+      }).then(() => fetch("/result?ok"), () => fetch("/result?failure")).then(() => {});
+    </script>`;
+    response.bodyOutputStream.write(body, body.length);
+  });
+
+  let contentPage2 = await CookieXPCShellUtils.loadContentPage(
+    "http://example.org/cross-test?" + blobURL
+  );
+
+  Assert.ok(!(await result), "BlobURL should not work");
+  await contentPage.close();
+  await contentPage2.close();
+});
diff --git a/dom/file/tests/test_blobURL_expiring.html b/dom/file/tests/test_blobURL_expiring.html
new file mode 100644
index 0000000000..7fdf461371
--- /dev/null
+++ b/dom/file/tests/test_blobURL_expiring.html
@@ -0,0 +1,48 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Test for Blob URI expiration</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+  <script>
+
+onmessage = function(e) {
+  var blobURL = e.data;
+
+  (new Promise(function(resolve, reject) {
+    var xhr = new XMLHttpRequest();
+    xhr.open("GET", blobURL);
+    xhr.send();
+    xhr.onload = function() {
+      is(xhr.response, "123", "Response matches!");
+      resolve();
+    }
+  })).then(function() {
+    document.body.removeChild(iframe);
+  }).then(function() {
+    var xhr = new XMLHttpRequest();
+    xhr.open("GET", blobURL);
+    xhr.onerror = function() {
+      ok(true, "The URL should be done!");
+      SimpleTest.finish();
+    }
+    xhr.onload = function() {
+      ok(false, "The URL should be done!");
+      SimpleTest.finish();
+    }
+    xhr.send();
+  });
+}
+
+var iframe = document.createElement('iframe');
+iframe.src = 'file_blobURL_expiring.html';
+document.body.appendChild(iframe);
+
+SimpleTest.waitForExplicitFinish();
+
+  </script>
+</body>
+</html>
diff --git a/dom/file/tests/test_blob_fragment_and_query.html b/dom/file/tests/test_blob_fragment_and_query.html
new file mode 100644
index 0000000000..fa3709c419
--- /dev/null
+++ b/dom/file/tests/test_blob_fragment_and_query.html
@@ -0,0 +1,62 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Test for Blob URI with fragments</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+  <script>
+
+var  blob = new Blob(['hello world']);
+ok(blob, "We have a blob.");
+
+var tests = [
+  { part: "", revoke: false, ok: true },
+  { part: "", revoke: true, ok: false },
+  { part: "?aa", revoke: false, ok: false },
+  { part: "?cc#dd", revoke: false, ok: false },
+  // Stripping #fragment on fetch
+  { part: "#bb", revoke: false, ok: true },
+  { part: "#ee?ff", revoke: false, ok: true }
+];
+
+function runTest() {
+  if (!tests.length) {
+    SimpleTest.finish();
+    return;
+  }
+
+  var url = URL.createObjectURL(blob);
+  ok(url, "We have a URI");
+
+  var test = tests.shift();
+
+  if (test.revoke) {
+    URL.revokeObjectURL(url + test.part);
+  }
+
+  var xhr = new XMLHttpRequest();
+  xhr.open('GET', url + test.part);
+
+  xhr.onload = function() {
+    ok(test.ok, `URL with "${test.part}" should send()`);
+    is(xhr.responseText, 'hello world', 'URL: ' + url + test.part);
+    runTest();
+  }
+
+  xhr.onerror = function() {
+    ok(!test.ok, `URL with "${test.part}" should fail on send()`);
+    runTest();
+  }
+
+  xhr.send();
+}
+
+SimpleTest.waitForExplicitFinish();
+runTest();
+
+  </script>
+</body>
+</html>
diff --git a/dom/file/tests/test_blob_reading.html b/dom/file/tests/test_blob_reading.html
new file mode 100644
index 0000000000..6efc5c4835
--- /dev/null
+++ b/dom/file/tests/test_blob_reading.html
@@ -0,0 +1,34 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Reading blobs</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script src="common_blob_reading.js"></script>
+  <script src="common_blob_types.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+  <script>
+
+SimpleTest.waitForExplicitFinish();
+
+async function runAllTests() {
+  let content = "hello world";
+  await forEachBlobType(content, async blob => {
+    await testBlobText(blob, content);
+    await workify('testBlobText', blob, content);
+
+    await testBlobArrayBuffer(blob, content);
+    await workify('testBlobArrayBuffer', blob, content);
+
+    await testBlobStream(blob, content);
+    await workify('testBlobStream', blob, content);
+  });
+}
+
+runAllTests().then(SimpleTest.finish);
+
+  </script>
+</body>
+</html>
diff --git a/dom/file/tests/test_blobconstructor.html b/dom/file/tests/test_blobconstructor.html
new file mode 100644
index 0000000000..d95444f9ea
--- /dev/null
+++ b/dom/file/tests/test_blobconstructor.html
@@ -0,0 +1,246 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=721569
+-->
+<head>
+  <title>Test for Blob constructor (Bug 721569)</title>
+  <script type="text/javascript" src="/MochiKit/MochiKit.js"></script>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript" src="common_blob.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=721569">Mozilla Bug 721569</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+"use strict";
+/** Test for Bug 721569 **/
+var blob = new Blob();
+ok(blob, "Blob should exist");
+
+ok(blob.size !== undefined, "Blob should have a size property");
+ok(blob.type !== undefined, "Blob should have a type property");
+ok(blob.slice, "Blob should have a slice method");
+
+blob = new Blob([], {type: null});
+ok(blob, "Blob should exist");
+is(blob.type, "null", "Blob type should be stringified");
+
+blob = new Blob([], {type: undefined});
+ok(blob, "Blob should exist");
+is(blob.type, "", "Blob type should be treated as missing");
+
+try {
+blob = new Blob([]);
+ok(true, "an empty blobParts argument should not throw");
+} catch(e) {
+ok(false, "NOT REACHED");
+}
+
+try {
+blob = new Blob(null);
+ok(false, "NOT REACHED");
+} catch(e) {
+ok(true, "a null blobParts member should throw");
+}
+
+try {
+blob = new Blob([], null);
+ok(true, "a null options member should not throw");
+} catch(e) {
+ok(false, "NOT REACHED");
+}
+
+try {
+blob = new Blob([], undefined);
+ok(true, "an undefined options member should not throw");
+} catch(e) {
+ok(false, "NOT REACHED");
+}
+
+try {
+blob = new Blob([], false);
+ok(false, "NOT REACHED");
+} catch(e) {
+ok(true, "a boolean options member should throw");
+}
+
+try {
+blob = new Blob([], 0);
+ok(false, "NOT REACHED");
+} catch(e) {
+ok(true, "a numeric options member should throw");
+}
+
+try {
+blob = new Blob([], "");
+ok(false, "NOT REACHED");
+} catch(e) {
+ok(true, "a string options member should throw");
+}
+
+/** Test for dictionary initialization order **/
+(function() {
+  var o = {};
+  var p = {type: "text/plain", endings: "transparent"};
+  var called = [];
+  function add_to_called(n) {
+    called.push(n);
+    return p[n];
+  }
+  ["type", "endings"].forEach(function(n) {
+    Object.defineProperty(o, n, { get: add_to_called.bind(null, n) });
+  });
+  var b = new Blob([], o);
+  is(JSON.stringify(called), JSON.stringify(["endings", "type"]), "dictionary members should be get in lexicographical order");
+})();
+
+let blob1 = new Blob(["squiggle"]);
+ok(blob1 instanceof Blob, "Blob constructor should produce Blobs");
+ok(!(blob1 instanceof File), "Blob constructor should not produce Files");
+is(blob1.type, "", "Blob constructor with no options should return Blob with empty type");
+is(blob1.size, 8, "Blob constructor should return Blob with correct size");
+
+let blob2 = new Blob(["steak"], {type: "content/type"});
+ok(blob2 instanceof Blob, "Blob constructor should produce Blobs");
+ok(!(blob2 instanceof File), "Blob constructor should not produce Files");
+is(blob2.type, "content/type", "Blob constructor with a type option should return Blob with the type");
+is(blob2.size, 5, "Blob constructor should return Blob with correct size");
+
+
+let aB = new ArrayBuffer(16);
+var int8View = new Int8Array(aB);
+for (var i = 0; i < 16; i++) {
+  int8View[i] = i+65;
+}
+
+let testData =
+ [
+    // Test 3 strings
+    [["foo", "bar", "baz"], {},
+                            [{start: 0, length: 9, contents: "foobarbaz"},
+                             {start: 0, length: 3, contents: "foo"},
+                             {start: 3, length:6, contents:  "barbaz"},
+                             {start: 6, length: 3, contents:  "baz"},
+                             {start: 6, length: 6, contents: "baz"},
+                             {start: 0, length: 9, contents:  "foobarbaz"},
+                             {start: 0, length: 11, contents: "foobarbaz"},
+                             {start: 10, length: 5, contents: ""}]],
+    // Test string, Blob, string
+    [["foo", blob1, "baz"], {},
+                            [{start: 0, length: 3, contents:  "foo"},
+                             {start: 3, length: 8, contents:  "squiggle"},
+                             {start: 2, length: 2, contents:  "os"},
+                             {start: 10, length: 2, contents: "eb"}]],
+    // Test blob, string, blob
+    [[blob1, "foo", blob1], {},
+                            [{start: 0, length: 8, contents:  "squiggle"},
+                             {start: 7, length: 2, contents:  "ef"},
+                             {start: 10, length: 2, contents: "os"},
+                             {start: 1, length: 3, contents:  "qui"},
+                             {start: 12, length: 3, contents: "qui"},
+                             {start: 40, length: 20, contents: ""}]],
+    // Test blobs all the way down
+    [[blob2, blob1, blob2], {},
+                            [{start: 0, length: 5, contents:  "steak"},
+                             {start: 5, length: 8, contents:  "squiggle"},
+                             {start: 13, length: 5, contents: "steak"},
+                             {start: 1, length: 2, contents:  "te"},
+                             {start: 6, length: 4, contents:  "quig"}]],
+    // Test an array buffer
+    [[aB, blob1, "foo"], {},
+                            [{start: 0, length: 8, contents:  "ABCDEFGH"},
+                             {start: 8, length:10, contents:  "IJKLMNOPsq"},
+                             {start: 17, length: 3, contents: "qui"},
+                             {start: 4, length: 8, contents:  "EFGHIJKL"}]],
+    // Test an ArrayBufferView
+    [[int8View, blob1, "foo"], {},
+                            [{start: 0, length: 8, contents:  "ABCDEFGH"},
+                             {start: 8, length:10, contents:  "IJKLMNOPsq"},
+                             {start: 17, length: 3, contents: "qui"},
+                             {start: 4, length: 8, contents:  "EFGHIJKL"}]],
+    // Test a partial ArrayBufferView
+    [[new Uint8Array(aB, 3, 5), blob1, "foo"], {},
+                            [{start: 0, length: 8, contents:  "DEFGHsqu"},
+                             {start: 8, length:10, contents:  "igglefoo"},
+                             {start: 4, length: 8, contents:  "Hsquiggl"}]],
+    // Test transparent line endings
+    [["foo\r\n", "bar\r", "baz\n"], { endings: "transparent" },
+                            [{start: 0, length: 5, contents:  "foo\r\n"},
+                             {start: 5, length: 4, contents:  "bar\r"},
+                             {start: 9, length: 4, contents: "baz\n"}]],
+    // Test transparent line endings when the second argument is omitted
+    [["foo\r\n", "bar\r", "baz\n"], undefined,
+                            [{start: 0, length: 5, contents:  "foo\r\n"},
+                             {start: 5, length: 4, contents:  "bar\r"},
+                             {start: 9, length: 4, contents: "baz\n"}]],
+    // Test native line endings
+    [["foo\r\n", "bar\r", "baz\n"], { endings: "native" },
+                            navigator.platform.includes("Win") ?
+                            [{start: 0, length: 5, contents:  "foo\r\n"},
+                             {start: 5, length: 5, contents:  "bar\r\n"},
+                             {start: 10, length: 5, contents: "baz\r\n"}] :
+                            [{start: 0, length: 4, contents:  "foo\n"},
+                             {start: 4, length: 4, contents:  "bar\n"},
+                             {start: 8, length: 4, contents: "baz\n"}]],
+    // Test type coercion of a number
+    [[3, int8View, "foo"], {},
+                            [{start: 0, length: 8, contents:  "3ABCDEFG"},
+                             {start: 8, length:10, contents:  "HIJKLMNOPf"},
+                             {start: 17, length: 4, contents: "foo"},
+                             {start: 4, length: 8, contents:  "DEFGHIJK"}]]
+ ];
+
+let currentTest = null;
+let testCounter = 0;
+
+function runTests() {
+  if (!currentTest || !currentTest[2].length) {
+    if (!testData.length) {
+      SimpleTest.finish();
+      return;
+    }
+
+    currentTest = testData.shift();
+    ++testCounter;
+  }
+
+  let [blobs, options] = currentTest;
+  let test = currentTest[2].shift();
+
+  let blob3;
+  if (options !== undefined) {
+    blob3 = new Blob(blobs, options);
+  } else {
+    blob3 = new Blob(blobs);
+  }
+
+  ok(blob3, "Test " + testCounter + " got blob");
+  ok(blob3 instanceof Blob, "Test " + testCounter + " blob is a Blob");
+  ok(!(blob3 instanceof File), "Test " + testCounter + " blob is not a File");
+
+  let slice = blob3.slice(test.start, test.start + test.length);
+  ok(slice, "Test " + testCounter + " got slice");
+  ok(slice instanceof Blob, "Test " + testCounter + " slice is a Blob");
+  ok(!(slice instanceof File), "Test " + testCounter + " slice is not a File");
+  is(slice.size, test.contents.length, "Test " + testCounter + " slice is correct size");
+
+  testBlob(slice, test.contents, "Test " + testCounter).then(() => {
+    SpecialPowers.gc();
+    runTests();
+  });
+}
+
+SimpleTest.requestLongerTimeout(2);
+SimpleTest.waitForExplicitFinish();
+runTests();
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/dom/file/tests/test_bloburi.js b/dom/file/tests/test_bloburi.js
new file mode 100644
index 0000000000..3485b8a681
--- /dev/null
+++ b/dom/file/tests/test_bloburi.js
@@ -0,0 +1,24 @@
+var ios = Cc["@mozilla.org/network/io-service;1"].getService(Ci.nsIIOService);
+
+var uris = [
+  {
+    uri: "blob:https://example.com/230d5d50-35f9-9745-a64a-15e47b731a81",
+    local: true,
+  },
+  {
+    uri: "rstp://1.2.3.4/some_path?param=a",
+    local: false,
+  },
+];
+
+function run_test() {
+  for (let i = 0; i < uris.length; i++) {
+    let uri = ios.newURI(uris[i].uri);
+    let flags = ios.getDynamicProtocolFlags(uri);
+
+    Assert.equal(
+      Ci.nsIProtocolHandler.URI_IS_LOCAL_RESOURCE & flags,
+      uris[i].local ? Ci.nsIProtocolHandler.URI_IS_LOCAL_RESOURCE : 0
+    );
+  }
+}
diff --git a/dom/file/tests/test_bug1507893.html b/dom/file/tests/test_bug1507893.html
new file mode 100644
index 0000000000..f0f83ff9ce
--- /dev/null
+++ b/dom/file/tests/test_bug1507893.html
@@ -0,0 +1,63 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Blob URLs fetched in workers</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+  <script>
+
+SimpleTest.waitForExplicitFinish();
+
+// Let's be positive.
+Promise.resolve()
+
+// Create a file.
+.then(_ => {
+  return new Promise(resolve => {
+    let openerURL = SimpleTest.getTestFileURL("fileapi_chromeScript.js");
+    let opener = SpecialPowers.loadChromeScript(openerURL);
+
+    opener.addMessageListener("files.opened", files => {
+      resolve(files[0]);
+    });
+
+    opener.sendAsyncMessage("files.open", [ "I am the blob content" ]);
+  })
+})
+
+// Just a couple of checks
+.then(file => {
+  ok(file instanceof File, "We want a file");
+  ok(file.size > 0, "We have content");
+  return file;
+})
+
+// Let's create a blobURL
+.then(file => URL.createObjectURL(file))
+
+// Let's send it to a worker.
+.then(url => {
+  return new Promise(resolve => {
+    let w = new Worker('worker_bug1507893.js');
+    w.onmessage = e => {
+     resolve(e.data);
+    };
+    w.postMessage(url);
+  });
+})
+
+// Let's check the worker's output
+.then(blob => {
+  ok(blob instanceof File, "The worker sends us a blob");
+  ok(blob.size > 0, "We have data");
+})
+
+// All done.
+.then(SimpleTest.finish);
+
+  </script>
+</body>
+</html>
diff --git a/dom/file/tests/test_bug1742540.html b/dom/file/tests/test_bug1742540.html
new file mode 100644
index 0000000000..7516f38a85
--- /dev/null
+++ b/dom/file/tests/test_bug1742540.html
@@ -0,0 +1,83 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Test for Bug 1742540</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+  <script>
+
+SimpleTest.waitForExplicitFinish();
+
+add_task(function setupPrefs() {
+  return SpecialPowers.pushPrefEnv({
+    set: [
+      ["dom.serviceWorkers.enabled", true],
+      ["dom.serviceWorkers.testing.enabled", true],
+    ],
+  });
+});
+
+function get_file() {
+  return new Promise(resolve => {
+    let xhr = new XMLHttpRequest();
+    xhr.open("GET", "/dynamic/getMyDirectory.sjs", false);
+    xhr.send();
+    let basePath = xhr.responseText;
+
+    let script = SpecialPowers.loadChromeScript(
+      SimpleTest.getTestFileURL("create_file_objects.js")
+    );
+    script.addMessageListener("created-file-objects", files => {
+      resolve(files[0]);
+    });
+    script.sendAsyncMessage("create-file-objects", {
+      fileNames: [basePath + "file_mozfiledataurl_audio.ogg"],
+    });
+  });
+}
+
+function wait_for_message(port, expected_message) {
+  return new Promise(resolve => {
+    port.onmessage = event => {
+      port.onmessage = null;
+      ok(event.data === expected_message, event.data);
+      resolve();
+    };
+  });
+}
+
+function unregister_and_done(registration) {
+  return registration.unregister().then(() => {
+    ok(true, "Will find leaks of nsPipe in BloatView without fix.");
+    SimpleTest.finish;
+  });
+}
+
+add_task(async function send_file_to_serviceworker() {
+  let registration = await navigator.serviceWorker
+    .register("worker_bug1742540.js", { scope: "./" })
+    .then(() => {
+      return navigator.serviceWorker.ready;
+    });
+
+  ok(registration.active, "ServiceWorker is activated");
+
+  let file = await get_file();
+  ok(file.size > 100000, "File size is big enough.");
+  let message = "ServiceWorker receives a file and did not reference it.";
+  let channel = new MessageChannel();
+  let received = wait_for_message(channel.port1, message);
+  registration.active.postMessage({ port: channel.port2, message, file }, [
+    channel.port2,
+  ]);
+  await received;
+
+  let finish = await unregister_and_done(registration);
+});
+
+  </script>
+</body>
+</html>
diff --git a/dom/file/tests/test_createFile.js b/dom/file/tests/test_createFile.js
new file mode 100644
index 0000000000..ebda3d4dae
--- /dev/null
+++ b/dom/file/tests/test_createFile.js
@@ -0,0 +1,52 @@
+add_task(async function () {
+  do_get_profile();
+
+  let existingFile = Services.dirsvc
+    .QueryInterface(Ci.nsIProperties)
+    .get("ProfD", Ci.nsIFile);
+  existingFile.append("exists.js");
+  existingFile.createUnique(Ci.nsIFile.NORMAL_FILE_TYPE, 0o600);
+
+  var outStream = Cc[
+    "@mozilla.org/network/file-output-stream;1"
+  ].createInstance(Ci.nsIFileOutputStream);
+  outStream.init(
+    existingFile,
+    0x02 | 0x08 | 0x20, // write, create, truncate
+    0o666,
+    0
+  );
+
+  var fileData = "Hello World!";
+  outStream.write(fileData, fileData.length);
+  outStream.close();
+
+  ok(existingFile.exists(), "exists.js exists");
+
+  let unknownFile = Services.dirsvc
+    .QueryInterface(Ci.nsIProperties)
+    .get("TmpD", Ci.nsIFile);
+  unknownFile.append("wow.txt");
+
+  ok(!unknownFile.exists(), unknownFile.path + " doesn't exist");
+
+  let a = await File.createFromNsIFile(existingFile, { existenceCheck: false });
+  ok(a.size != 0, "The size is correctly set");
+
+  let b = await File.createFromNsIFile(unknownFile, { existenceCheck: false });
+  ok(b.size == 0, "The size is 0 for unknown file");
+
+  let c = await File.createFromNsIFile(existingFile, { existenceCheck: true });
+  ok(c.size != 0, "The size is correctly set");
+
+  let d = await File.createFromNsIFile(unknownFile, {
+    existenceCheck: true,
+  }).then(
+    _ => true,
+    _ => false
+  );
+  ok(d === false, "Exception thrown");
+
+  existingFile.remove(true);
+  ok(!existingFile.exists(), "exists.js doesn't exist anymore");
+});
diff --git a/dom/file/tests/test_file_from_blob.html b/dom/file/tests/test_file_from_blob.html
new file mode 100644
index 0000000000..8c12a2823a
--- /dev/null
+++ b/dom/file/tests/test_file_from_blob.html
@@ -0,0 +1,110 @@
+<!doctype html>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=819900
+-->
+    <head>
+<title>Test for crash caused by unloading and reloading srcdoc iframes</title>
+<script src="/tests/SimpleTest/SimpleTest.js"></script>
+<link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=819900">Mozilla Bug 819900</a>
+
+<pre id="test">
+<script>
+
+  var b = new Blob(['1234567890']);
+  ok(b, 'Blob created');
+  is(b.size, 10, 'Blob has the right size');
+
+  var status = false;
+  try {
+    f = new File(b);
+  } catch(e) {
+    status = true;
+  }
+  ok(status, "File throws if the second argument is missing");
+
+  status = false;
+  try {
+    f = new File(42, 'foobar.txt');
+  } catch(e) {
+    status = true;
+  }
+  ok(status, "File throws if the argument is not an array");
+
+  status = false;
+  try {
+    f = new File({}, 'foobar.txt');
+  } catch(e) {
+    status = true;
+  }
+  ok(status, "File throws if the argument is not an array");
+
+  status = false;
+  try {
+    f = new File("hello world", 'foobar.txt');
+  } catch(e) {
+    status = true;
+  }
+  ok(status, "File throws if the argument is not an array");
+
+  f = new File(['1234567890'], '');
+  ok(f, 'File created');
+  is(f.size, 10, 'File has the right size');
+  is(f.name, '');
+  is(f.type, '');
+
+  f = new File(['1234567890'], 42);
+  ok(f, 'File created');
+  is(f.size, 10, 'File has the right size');
+  is(f.name, '42');
+  is(f.type, '');
+
+  f = new File(['1234567890'], 'text.txt');
+  ok(f, 'File created');
+  is(f.size, 10, 'File has the right size');
+  is(f.name, 'text.txt');
+  is(f.type, '');
+
+  f = new File(['1234567890'], 'text.txt', { type: 'plain/text' });
+  ok(f, 'File created');
+  is(f.size, 10, 'File has the right size');
+  is(f.name, 'text.txt');
+  is(f.type, 'plain/text');
+
+  f = new File([b], 'text.txt');
+  ok(f, 'File created');
+  is(f.name, 'text.txt');
+  is(f.type, '');
+  is(f.size, b.size);
+
+  f = new File([b], 'test.txt', { type: 'plain/text' });
+  ok(f, 'File created');
+  is(f.name, 'test.txt');
+  is(f.type, 'plain/text');
+  is(f.size, b.size);
+
+  f = new File([b, b], 'test.txt', { type: 'plain/text' });
+  ok(f, 'File created');
+  is(f.name, 'test.txt');
+  is(f.type, 'plain/text');
+  is(f.size, b.size * 2);
+
+  var f2 = new File([f, f], 'test.txt', { type: 'plain/text' });
+  ok(f2, 'File created');
+  is(f2.name, 'test.txt');
+  is(f2.type, 'plain/text');
+  is(f2.size, f.size * 2);
+
+  var f2 = new File([f, f], 'test.txt', b);
+  ok(f2, 'File created');
+  is(f2.name, 'test.txt');
+  is(f2.type, b.type);
+  is(f2.size, f.size * 2);
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/dom/file/tests/test_file_negative_date.html b/dom/file/tests/test_file_negative_date.html
new file mode 100644
index 0000000000..2e8528b88d
--- /dev/null
+++ b/dom/file/tests/test_file_negative_date.html
@@ -0,0 +1,29 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1158437
+-->
+<head>
+  <title>Test for negative date in File (Bug 1158437)</title>
+  <script type="text/javascript" src="/MochiKit/MochiKit.js"></script>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1158437">Mozilla Bug 1158437</a>
+
+<script class="testbody" type="text/javascript">
+"use strict";
+
+var blob = new Blob(['hello world']);
+var f1 = new File([blob], 'f1.txt', { lastModified: 0 });
+var f2 = new File([blob], 'f2.txt', { lastModified: -1 });
+var f3 = new File([blob], 'f3.txt', { lastModified: -1000 });
+
+is(f1.lastModified, 0, "lastModified == 0 is supported");
+is(f2.lastModified, -1, "lastModified == -1 is supported");
+is(f3.lastModified, -1000, "lastModified == -1000 is supported");
+
+</script>
+</body>
+</html>
diff --git a/dom/file/tests/test_fileapi_basic.html b/dom/file/tests/test_fileapi_basic.html
new file mode 100644
index 0000000000..7f7aed788e
--- /dev/null
+++ b/dom/file/tests/test_fileapi_basic.html
@@ -0,0 +1,24 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Test for FileReader API</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+  <script type="text/javascript" src="common_fileReader.js"></script>
+</head>
+
+<body>
+<script class="testbody" type="text/javascript">
+
+SimpleTest.waitForExplicitFinish();
+SimpleTest.requestLongerTimeout(3);
+
+test_setup()
+.then(data => {
+  return runBasicTests(data);
+})
+.then(SimpleTest.finish);
+
+</script>
+</body>
+</html>
diff --git a/dom/file/tests/test_fileapi_basic_worker.html b/dom/file/tests/test_fileapi_basic_worker.html
new file mode 100644
index 0000000000..03db1b4cb6
--- /dev/null
+++ b/dom/file/tests/test_fileapi_basic_worker.html
@@ -0,0 +1,38 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Test for FileReader API in workers</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+  <script type="text/javascript" src="common_fileReader.js"></script>
+</head>
+
+<body>
+<script class="testbody" type="text/javascript">
+
+SimpleTest.waitForExplicitFinish();
+SimpleTest.requestLongerTimeout(3);
+
+test_setup()
+.then(data => {
+  let worker = new Worker('worker_fileReader.js');
+  worker.postMessage({ tests: 'basic', data });
+
+  worker.onmessage = event => {
+    if (event.data.type == 'finish') {
+      SimpleTest.finish();
+      return;
+    }
+
+    if (event.data.type == 'check') {
+      ok(event.data.status, event.data.msg);
+      return;
+    }
+
+    ok(false, "Unknown message.");
+  }
+});
+
+</script>
+</body>
+</html>
diff --git a/dom/file/tests/test_fileapi_encoding.html b/dom/file/tests/test_fileapi_encoding.html
new file mode 100644
index 0000000000..f20a46ac6c
--- /dev/null
+++ b/dom/file/tests/test_fileapi_encoding.html
@@ -0,0 +1,24 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Test for FileReader API</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+  <script type="text/javascript" src="common_fileReader.js"></script>
+</head>
+
+<body>
+<script class="testbody" type="text/javascript">
+
+SimpleTest.waitForExplicitFinish();
+SimpleTest.requestLongerTimeout(3);
+
+test_setup()
+.then(data => {
+  return runEncodingTests(data);
+})
+.then(SimpleTest.finish);
+
+</script>
+</body>
+</html>
diff --git a/dom/file/tests/test_fileapi_encoding_worker.html b/dom/file/tests/test_fileapi_encoding_worker.html
new file mode 100644
index 0000000000..ab6827f086
--- /dev/null
+++ b/dom/file/tests/test_fileapi_encoding_worker.html
@@ -0,0 +1,38 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Test for FileReader API in workers</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+  <script type="text/javascript" src="common_fileReader.js"></script>
+</head>
+
+<body>
+<script class="testbody" type="text/javascript">
+
+SimpleTest.waitForExplicitFinish();
+SimpleTest.requestLongerTimeout(3);
+
+test_setup()
+.then(data => {
+  let worker = new Worker('worker_fileReader.js');
+  worker.postMessage({ tests: 'encoding', data });
+
+  worker.onmessage = event => {
+    if (event.data.type == 'finish') {
+      SimpleTest.finish();
+      return;
+    }
+
+    if (event.data.type == 'check') {
+      ok(event.data.status, event.data.msg);
+      return;
+    }
+
+    ok(false, "Unknown message.");
+  }
+});
+
+</script>
+</body>
+</html>
diff --git a/dom/file/tests/test_fileapi_other.html b/dom/file/tests/test_fileapi_other.html
new file mode 100644
index 0000000000..6c01415be8
--- /dev/null
+++ b/dom/file/tests/test_fileapi_other.html
@@ -0,0 +1,24 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Test for FileReader API</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+  <script type="text/javascript" src="common_fileReader.js"></script>
+</head>
+
+<body>
+<script class="testbody" type="text/javascript">
+
+SimpleTest.waitForExplicitFinish();
+SimpleTest.requestLongerTimeout(3);
+
+test_setup()
+.then(data => {
+  return runOtherTests(data);
+})
+.then(SimpleTest.finish);
+
+</script>
+</body>
+</html>
diff --git a/dom/file/tests/test_fileapi_other_worker.html b/dom/file/tests/test_fileapi_other_worker.html
new file mode 100644
index 0000000000..a535d3fcb4
--- /dev/null
+++ b/dom/file/tests/test_fileapi_other_worker.html
@@ -0,0 +1,38 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Test for FileReader API in workers</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+  <script type="text/javascript" src="common_fileReader.js"></script>
+</head>
+
+<body>
+<script class="testbody" type="text/javascript">
+
+SimpleTest.waitForExplicitFinish();
+SimpleTest.requestLongerTimeout(3);
+
+test_setup()
+.then(data => {
+  let worker = new Worker('worker_fileReader.js');
+  worker.postMessage({ tests: 'other', data });
+
+  worker.onmessage = event => {
+    if (event.data.type == 'finish') {
+      SimpleTest.finish();
+      return;
+    }
+
+    if (event.data.type == 'check') {
+      ok(event.data.status, event.data.msg);
+      return;
+    }
+
+    ok(false, "Unknown message.");
+  }
+});
+
+</script>
+</body>
+</html>
diff --git a/dom/file/tests/test_fileapi_slice_image.html b/dom/file/tests/test_fileapi_slice_image.html
new file mode 100644
index 0000000000..c873afa438
--- /dev/null
+++ b/dom/file/tests/test_fileapi_slice_image.html
@@ -0,0 +1,139 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Test for File API + Slice</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript" src="common_blob.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+
+<body>
+
+<p id="display">
+  <canvas id=canvas width=1100 height=1100 hidden moz-opaque></canvas>
+  <canvas id=testcanvas hidden moz-opaque></canvas>
+</p>
+
+<script type="text/javascript">
+
+SimpleTest.waitForExplicitFinish();
+SimpleTest.requestLongerTimeout(4);
+
+// Create files containing data we'll test with. We'll want long
+// strings to ensure they span multiple buffers while loading
+
+let canvasData;
+let testBinaryData;
+
+function imageLoadHandler(event, resolve) {
+  let origcanvas = $("canvas");
+  let testcanvas = $("testcanvas");
+  let image = event.target;
+  is(image.naturalWidth, origcanvas.width, "width correct");
+  is(image.naturalHeight, origcanvas.height, "height correct");
+
+  testcanvas.width = origcanvas.width;
+  testcanvas.height = origcanvas.height;
+  testcanvas.getContext("2d").drawImage(image, 0, 0);
+  // Do not use |is(testcanvas.toDataURL("image/png"), origcanvas.toDataURL("image/png"), "...");| that results in a _very_ long line.
+  let origDataURL = origcanvas.toDataURL("image/png");
+  let testDataURL = testcanvas.toDataURL("image/png");
+  is(testDataURL.length, origDataURL.length,
+     "Length of correct image data");
+  ok(testDataURL == origDataURL,
+     "Content of correct image data");
+  resolve();
+}
+
+createCanvasURL()
+.then(data => {
+  for (var i = 0; i < 256; i++) {
+    testBinaryData += String.fromCharCode(i);
+  }
+  while (testBinaryData.length < 20000) {
+    testBinaryData += testBinaryData;
+  }
+
+  canvasData = data;
+})
+
+// image in the middle
+.then(() => {
+  return createFile(testBinaryData + canvasData + testBinaryData, "middleTestFile");
+})
+
+// image in the middle - loader
+.then(file => {
+  return new Promise(resolve => {
+    is(file.size, canvasData.length + testBinaryData.length * 2, "correct file size (middle)");
+
+    var img = new Image();
+    img.src = URL.createObjectURL(file.slice(testBinaryData.length,
+                                             testBinaryData.length + canvasData.length));
+    img.onload = event => {
+      imageLoadHandler(event, resolve);
+    }
+  });
+})
+
+// image at start
+.then(() => {
+  return createFile(canvasData + testBinaryData, "startTestFile");
+})
+
+// image at start - loader
+.then(file => {
+  return new Promise(resolve => {
+    is(file.size, canvasData.length + testBinaryData.length, "correct file size (start)");
+
+    var img = new Image();
+    img.src = URL.createObjectURL(file.slice(0, canvasData.length));
+    img.onload = event => {
+      imageLoadHandler(event, resolve);
+    }
+  });
+})
+
+// image at end
+.then(() => {
+  return createFile(testBinaryData + canvasData, "endTestFile");
+})
+
+// image at end - loader
+.then(file => {
+  return new Promise(resolve => {
+    is(file.size, canvasData.length + testBinaryData.length, "correct file size (end)");
+
+    var img = new Image();
+    img.src = URL.createObjectURL(file.slice(testBinaryData.length,
+                                             testBinaryData.length + canvasData.length));
+    img.onload = event => {
+      imageLoadHandler(event, resolve);
+    }
+  });
+})
+
+// image past end
+.then(() => {
+  return createFile(testBinaryData + canvasData, "pastEndTestFile");
+})
+
+// image past end - loader
+.then(file => {
+  return new Promise(resolve => {
+    is(file.size, canvasData.length + testBinaryData.length, "correct file size (end)");
+
+    var img = new Image();
+    img.src = URL.createObjectURL(file.slice(testBinaryData.length,
+                                             testBinaryData.length + canvasData.length + 1000));
+    img.onload = event => {
+      imageLoadHandler(event, resolve);
+    }
+  });
+})
+
+.then(SimpleTest.finish);
+
+</script>
+</body>
+</html>
diff --git a/dom/file/tests/test_fileapi_slice_memFile_1.html b/dom/file/tests/test_fileapi_slice_memFile_1.html
new file mode 100644
index 0000000000..56d63d15ba
--- /dev/null
+++ b/dom/file/tests/test_fileapi_slice_memFile_1.html
@@ -0,0 +1,37 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Test for File API + Slice (in memory)</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript" src="common_blob.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+
+<body>
+
+<p id="display">
+  <canvas id=canvas width=1100 height=1100 hidden moz-opaque></canvas>
+</p>
+
+<script type="text/javascript">
+
+SimpleTest.waitForExplicitFinish();
+SimpleTest.requestLongerTimeout(4);
+
+createCanvasURL()
+.then(data => {
+  let cx = $("canvas").getContext('2d');
+  return Promise.all([toBlobPromise(cx.canvas),
+                      Promise.resolve(data)]);
+})
+
+.then(args => {
+  let [memFile, data] = args;
+  return testSlice(memFile, data.length, "image/png", data, "memFile", RANGE_1);
+})
+
+.then(SimpleTest.finish);
+
+</script>
+</body>
+</html>
diff --git a/dom/file/tests/test_fileapi_slice_memFile_2.html b/dom/file/tests/test_fileapi_slice_memFile_2.html
new file mode 100644
index 0000000000..aef8813bf5
--- /dev/null
+++ b/dom/file/tests/test_fileapi_slice_memFile_2.html
@@ -0,0 +1,37 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Test for File API + Slice (in memory)</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript" src="common_blob.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+
+<body>
+
+<p id="display">
+  <canvas id=canvas width=1100 height=1100 hidden moz-opaque></canvas>
+</p>
+
+<script type="text/javascript">
+
+SimpleTest.waitForExplicitFinish();
+SimpleTest.requestLongerTimeout(4);
+
+createCanvasURL()
+.then(data => {
+  let cx = $("canvas").getContext('2d');
+  return Promise.all([toBlobPromise(cx.canvas),
+                      Promise.resolve(data)]);
+})
+
+.then(args => {
+  let [memFile, data] = args;
+  return testSlice(memFile, data.length, "image/png", data, "memFile", RANGE_2);
+})
+
+.then(SimpleTest.finish);
+
+</script>
+</body>
+</html>
diff --git a/dom/file/tests/test_fileapi_slice_realFile_1.html b/dom/file/tests/test_fileapi_slice_realFile_1.html
new file mode 100644
index 0000000000..97798d805a
--- /dev/null
+++ b/dom/file/tests/test_fileapi_slice_realFile_1.html
@@ -0,0 +1,37 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Test for File API + Slice (in file)</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript" src="common_blob.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+
+<body>
+
+<p id="display">
+  <canvas id=canvas width=1100 height=1100 hidden moz-opaque></canvas>
+</p>
+
+<script type="text/javascript">
+
+SimpleTest.waitForExplicitFinish();
+SimpleTest.requestLongerTimeout(4);
+
+let canvasData;
+
+createCanvasURL()
+.then(data => {
+  canvasData = data;
+  return createFile(data, "basicTestFile1");
+})
+
+.then(file => {
+  return testSlice(file, canvasData.length, "", canvasData, "fileFile", RANGE_1);
+})
+
+.then(SimpleTest.finish);
+
+</script>
+</body>
+</html>
diff --git a/dom/file/tests/test_fileapi_slice_realFile_2.html b/dom/file/tests/test_fileapi_slice_realFile_2.html
new file mode 100644
index 0000000000..882ce61c03
--- /dev/null
+++ b/dom/file/tests/test_fileapi_slice_realFile_2.html
@@ -0,0 +1,37 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Test for File API + Slice (in file)</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript" src="common_blob.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+
+<body>
+
+<p id="display">
+  <canvas id=canvas width=1100 height=1100 hidden moz-opaque></canvas>
+</p>
+
+<script type="text/javascript">
+
+SimpleTest.waitForExplicitFinish();
+SimpleTest.requestLongerTimeout(4);
+
+let canvasData;
+
+createCanvasURL()
+.then(data => {
+  canvasData = data;
+  return createFile(data, "basicTestFile2");
+})
+
+.then(file => {
+  return testSlice(file, canvasData.length, "", canvasData, "fileFile", RANGE_2);
+})
+
+.then(SimpleTest.finish);
+
+</script>
+</body>
+</html>
diff --git a/dom/file/tests/test_fileapi_twice.html b/dom/file/tests/test_fileapi_twice.html
new file mode 100644
index 0000000000..96e7febdce
--- /dev/null
+++ b/dom/file/tests/test_fileapi_twice.html
@@ -0,0 +1,24 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Test for FileReader API</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+  <script type="text/javascript" src="common_fileReader.js"></script>
+</head>
+
+<body>
+<script class="testbody" type="text/javascript">
+
+SimpleTest.waitForExplicitFinish();
+SimpleTest.requestLongerTimeout(3);
+
+test_setup()
+.then(data => {
+  return runTwiceTests(data);
+})
+.then(SimpleTest.finish);
+
+</script>
+</body>
+</html>
diff --git a/dom/file/tests/test_fileapi_twice_worker.html b/dom/file/tests/test_fileapi_twice_worker.html
new file mode 100644
index 0000000000..a79d3992b2
--- /dev/null
+++ b/dom/file/tests/test_fileapi_twice_worker.html
@@ -0,0 +1,38 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Test for FileReader API in workers</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+  <script type="text/javascript" src="common_fileReader.js"></script>
+</head>
+
+<body>
+<script class="testbody" type="text/javascript">
+
+SimpleTest.waitForExplicitFinish();
+SimpleTest.requestLongerTimeout(3);
+
+test_setup()
+.then(data => {
+  let worker = new Worker('worker_fileReader.js');
+  worker.postMessage({ tests: 'twice', data });
+
+  worker.onmessage = event => {
+    if (event.data.type == 'finish') {
+      SimpleTest.finish();
+      return;
+    }
+
+    if (event.data.type == 'check') {
+      ok(event.data.status, event.data.msg);
+      return;
+    }
+
+    ok(false, "Unknown message.");
+  }
+});
+
+</script>
+</body>
+</html>
diff --git a/dom/file/tests/test_ipc_messagemanager_blob.js b/dom/file/tests/test_ipc_messagemanager_blob.js
new file mode 100644
index 0000000000..dacdc9e7bb
--- /dev/null
+++ b/dom/file/tests/test_ipc_messagemanager_blob.js
@@ -0,0 +1,102 @@
+"use strict";
+
+const { XPCShellContentUtils } = ChromeUtils.importESModule(
+  "resource://testing-common/XPCShellContentUtils.sys.mjs"
+);
+
+XPCShellContentUtils.init(this);
+
+function childFrameScript() {
+  addMessageListener("test:ipcClonedMessage", function (message) {
+    if (!Blob.isInstance(message.json)) {
+      sendAsyncMessage(message.name, message.json);
+      return;
+    }
+
+    let reader = new FileReader();
+    reader.addEventListener("load", function () {
+      let response =
+        reader.result == "this is a great success!" ? message.json : "error";
+      sendAsyncMessage(message.name, response);
+    });
+    reader.readAsText(message.json);
+  });
+}
+
+add_task(async function test() {
+  let page = await XPCShellContentUtils.loadContentPage("about:blank", {
+    remote: true,
+  });
+
+  page.loadFrameScript(childFrameScript);
+
+  const blobString = "this is a great success!";
+
+  const messages = [
+    "hi!",
+    "",
+    2,
+    -0.04,
+    34329873249872400000000000000,
+    true,
+    false,
+    null,
+    0,
+
+    // Make sure this one is always last.
+    new Blob(["this ", "is ", "a ", "great ", "success!"], {
+      type: "text/plain",
+    }),
+  ];
+  let receivedMessageIndex = 0;
+
+  let mm = page.browser.messageManager;
+  let done = new Promise(resolve => {
+    mm.addMessageListener("test:ipcClonedMessage", async message => {
+      let data = message.json;
+
+      if (Blob.isInstance(data)) {
+        equal(receivedMessageIndex, messages.length - 1, "Blob is last");
+        equal(
+          data.size,
+          messages[receivedMessageIndex].size,
+          "Correct blob size"
+        );
+        equal(
+          data.type,
+          messages[receivedMessageIndex].type,
+          "Correct blob type"
+        );
+
+        let reader1 = new FileReader();
+        reader1.readAsText(data);
+
+        let reader2 = new FileReader();
+        reader2.readAsText(messages[receivedMessageIndex]);
+
+        await Promise.all([
+          new Promise(res => (reader1.onload = res)),
+          new Promise(res => (reader2.onload = res)),
+        ]);
+
+        equal(reader1.result, blobString, "Result 1");
+        equal(reader2.result, blobString, "Result 2");
+
+        resolve();
+      } else {
+        equal(
+          data,
+          messages[receivedMessageIndex++],
+          "Got correct round-tripped response"
+        );
+      }
+    });
+  });
+
+  for (let message of messages) {
+    mm.sendAsyncMessage("test:ipcClonedMessage", message);
+  }
+
+  await done;
+  await page.close();
+});
diff --git a/dom/file/tests/test_mozfiledataurl.html b/dom/file/tests/test_mozfiledataurl.html
new file mode 100644
index 0000000000..68c88fa28c
--- /dev/null
+++ b/dom/file/tests/test_mozfiledataurl.html
@@ -0,0 +1,224 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=utf-8">
+  <title>Test for File urls</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body onload="start()">
+<p id="display">
+<iframe id=inner></iframe>
+<iframe id=iframe></iframe>
+<img id=img onload="gen.next(event);">
+<audio id=audio onloadeddata="gen.next(event);">
+</p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+<script class="testbody" type="application/javascript">
+
+try {
+  URL.createObjectURL(undefined);
+} catch(e) { }
+
+window.addEventListener("message", function(e) {
+  gen.next(JSON.parse(e.data));
+});
+
+const innerSameSiteURI = "file_mozfiledataurl_inner.html";
+const innerCrossSiteURI = "http://example.com/tests/dom/file/tests/file_mozfiledataurl_inner.html"
+
+var fileNames = ["file_mozfiledataurl_img.jpg",
+                 "file_mozfiledataurl_audio.ogg",
+                 "file_mozfiledataurl_doc.html",
+                 "file_mozfiledataurl_text.txt"];
+
+function start() {
+  let xhr = new XMLHttpRequest;
+  xhr.open("GET", "/dynamic/getMyDirectory.sjs", false);
+  xhr.send();
+  let basePath = xhr.responseText;
+
+  let fullFileNames = [];
+  for (let name of fileNames) {
+    fullFileNames.push(basePath + name);
+  }
+
+  var script = SpecialPowers.loadChromeScript(SimpleTest.getTestFileURL("create_file_objects.js"));
+
+  script.addMessageListener("created-file-objects", function handler(files) {
+    script.removeMessageListener("created-file-objects", handler);
+    gen = runTest(files);
+    gen.next();
+  });
+
+  script.sendAsyncMessage("create-file-objects", {fileNames: fullFileNames});
+};
+
+SimpleTest.waitForExplicitFinish();
+SimpleTest.expectAssertions(0, 3);
+
+function* runTest([imgFile, audioFile, docFile, xhrFile]) {
+  inner = document.getElementById('inner');
+  img = document.getElementById('img');
+  audio = document.getElementById('audio');
+  iframe = document.getElementById('iframe');
+  inner.onload = function() { gen.next("inner loaded"); };
+
+  // Attempt to load a image in this document
+  var fileurl = URL.createObjectURL(imgFile);
+  img.src = fileurl;
+  var e = (yield);
+  is(e.type, "load", "loaded successfully");
+  is(img.width, 120, "correct width");
+  is(img.height, 90, "correct height");
+
+  // Revoke url and attempt to load a image in this document
+  img.src = "file_mozfiledataurl_img.jpg";
+  is((yield).type, "load", "successfull reset image");
+  URL.revokeObjectURL(fileurl);
+  todo(false, "urls need to act like 404s, not fail to parse");
+/*  img.src = fileurl;
+  var e = (yield);
+  is(e.type, "error", "failed successfully");
+  isnot(img.width, 120, "correct error width");
+  isnot(img.height, 90, "correct error height");
+*/
+  // Generate new fileurl and make sure it's different from the old
+  var oldFileurl = fileurl;
+  fileurl = URL.createObjectURL(imgFile);
+  isnot(fileurl, oldFileurl, "URL.createObjectURL generated the same url twice");
+
+  // Attempt to load an image in a different same-origin document
+  inner.src = innerSameSiteURI;
+  yield undefined;
+  inner.contentWindow.postMessage(JSON.stringify({img:fileurl}), "*");
+  var res = (yield);
+  is(res.type, "load", "loaded successfully");
+  is(res.width, 120, "correct width");
+  is(res.height, 90, "correct height");
+
+  // Attempt to load an image in a different cross-origin document
+  inner.src = innerCrossSiteURI;
+  yield undefined;
+  inner.contentWindow.postMessage(JSON.stringify({img:fileurl}), "*");
+  var res = (yield);
+  is(res.type, "error", "failed successfully");
+  isnot(res.width, 120, "correct error width");
+  isnot(res.height, 90, "correct error height");
+
+  // Attempt to load an audio in this document
+  fileurl = URL.createObjectURL(audioFile);
+  audio.src = fileurl;
+  var e = (yield);
+  is(e.type, "loadeddata", "loaded successfully");
+
+  // Revoke url and attempt to load a audio in this document
+  audio.src = "file_mozfiledataurl_audio.ogg";
+  is((yield).type, "loadeddata", "successfully reset audio");
+  URL.revokeObjectURL(fileurl);
+  todo(false, "urls need to act like 404s, not fail to parse");
+/*  img.src = fileurl;
+  var e = (yield);
+  is(e.type, "error", "failed successfully");
+  isnot(img.width, 120, "correct error width");
+  isnot(img.height, 90, "correct error height");
+*/
+  // Generate new fileurl and make sure it's different from the old
+  var oldFileurl = fileurl;
+  fileurl = URL.createObjectURL(audioFile);
+  isnot(fileurl, oldFileurl, "URL.createObjectURL generated the same url twice");
+
+  // Attempt to load an audio in a different same-origin document
+  inner.src = innerSameSiteURI;
+  yield undefined;
+  inner.contentWindow.postMessage(JSON.stringify({audio:fileurl}), "*");
+  var res = (yield);
+  is(res.type, "loadeddata", "loaded successfully");
+
+  // Attempt to load an audio in a different cross-origin document
+  inner.src = innerCrossSiteURI;
+  yield undefined;
+  inner.contentWindow.postMessage(JSON.stringify({audio:fileurl}), "*");
+  var res = (yield);
+  is(res.type, "error", "failed successfully");
+
+  // Attempt to load a HTML document in an iframe in this document
+  iframe.onload = function() { gen.next(); };
+  iframe.src = "file_mozfiledataurl_doc.html";
+  yield undefined;
+  is(iframe.contentDocument.getElementsByTagName("p")[0].textContent,
+     "This here is a document!",
+     "iframe loaded successfully");
+  is(iframe.contentDocument.getElementById("img").width, 120,
+     "image in iframe width");
+  is(iframe.contentDocument.getElementById("img").height, 90,
+     "image in iframe height");
+
+  // Attempt to load a HTML document in an iframe in this document, using file url
+  fileurl = URL.createObjectURL(docFile);
+  iframe.src = fileurl;
+  yield undefined;
+  is(iframe.contentDocument.getElementsByTagName("p")[0].textContent,
+     "This here is a document!",
+     "iframe loaded successfully");
+  isnot(iframe.contentDocument.getElementById("img").width, 120,
+        "failed image in iframe width");
+  isnot(iframe.contentDocument.getElementById("img").height, 90,
+        "failed image in iframe height");
+
+  // Attempt to load a HTML document in an iframe in inner document
+  inner.src = innerSameSiteURI;
+  is((yield), "inner loaded", "correct gen.next()");
+  inner.contentWindow.postMessage(JSON.stringify({iframe:"file_mozfiledataurl_doc.html"}), "*");
+  var res = (yield);
+  is(res.type, "load", "loaded successfully");
+  is(res.text, "This here is a document!", "loaded successfully");
+  is(res.imgWidth, 120, "correct width");
+
+  // Attempt to load a HTML document in an iframe in inner document, using file url
+  inner.contentWindow.postMessage(JSON.stringify({iframe:fileurl}), "*");
+  var res = (yield);
+  is(res.type, "load", "loaded successfully");
+  is(res.text, "This here is a document!", "loaded successfully");
+  isnot(res.imgWidth, 120, "correct width");
+
+  // Attempt to load a HTML document in an iframe in inner cross-site document, using file url
+  inner.src = innerCrossSiteURI;
+  is((yield), "inner loaded", "correct gen.next()");
+  inner.contentWindow.postMessage(JSON.stringify({iframe:fileurl}), "*");
+  var res = (yield);
+  is(res.type, "error", "load failed successfully");
+
+  // Attempt to load file url using XHR
+  fileurl = URL.createObjectURL(xhrFile);
+  xhr = new XMLHttpRequest;
+  xhr.onload = function() { gen.next("XHR finished"); };
+  xhr.open("GET", fileurl);
+  xhr.send();
+  is((yield), "XHR finished", "correct gen.next()");
+  xhr.responseText == "Yarr, here be plaintext file, ya landlubber\n";
+
+  // Attempt to load file url using XHR in inner document
+  inner.src = innerSameSiteURI;
+  is((yield), "inner loaded", "correct gen.next()");
+  inner.contentWindow.postMessage(JSON.stringify({xhr:fileurl}), "*");
+  var res = (yield);
+  is(res.didThrow, undefined, "load successful");
+  is(res.text, "Yarr, here be plaintext file, ya landlubber\n", "load successful");
+
+  // Attempt to load file url using XHR
+  inner.src = innerCrossSiteURI;
+  is((yield), "inner loaded", "correct gen.next()");
+  inner.contentWindow.postMessage(JSON.stringify({xhr:fileurl}), "*");
+  var res = (yield);
+  is(res.didError, true, "load failed successfully");
+
+  SimpleTest.finish();
+}
+</script>
+</pre>
+</body>
+</html>
diff --git a/dom/file/tests/test_nonascii_blob_url.html b/dom/file/tests/test_nonascii_blob_url.html
new file mode 100644
index 0000000000..1c6c833958
--- /dev/null
+++ b/dom/file/tests/test_nonascii_blob_url.html
@@ -0,0 +1,28 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Test blob URL for non-ascii domain</title>
+  <script type="text/javascript" src="/MochiKit/MochiKit.js"></script>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<div id="content"></div>
+<script class="testbody" type="text/javascript">
+
+var iframe = document.createElement('iframe');
+iframe.src = 'http://xn--exmple-cua.test/tests/dom/file/tests/file_nonascii_blob_url.html';
+iframe.onload = function() {
+  iframe.contentWindow.postMessage('hello world', '*');
+  onmessage = function(e) {
+    is(e.data, 'hello world', "Blob URL for non-ascii domain works");
+    SimpleTest.finish();
+  }
+}
+
+document.getElementById('content').appendChild(iframe);
+SimpleTest.waitForExplicitFinish();
+
+</script>
+</body>
+</html>
diff --git a/dom/file/tests/worker_blob_reading.js b/dom/file/tests/worker_blob_reading.js
new file mode 100644
index 0000000000..f57161c220
--- /dev/null
+++ b/dom/file/tests/worker_blob_reading.js
@@ -0,0 +1,26 @@
+importScripts("common_blob_reading.js");
+
+function info(message) {
+  postMessage({ type: "info", message });
+}
+
+function ok(a, message) {
+  postMessage({ type: "test", test: !!a, message });
+}
+
+function is(a, b, message) {
+  ok(a === b, message);
+}
+
+onmessage = function (e) {
+  self[e.data.func](e.data.blob, e.data.content).then(
+    () => {
+      postMessage({ type: "done" });
+    },
+    exc => {
+      dump(exc);
+      dump(exc.stack);
+      postMessage({ type: "error", message: exc.toString() });
+    }
+  );
+};
diff --git a/dom/file/tests/worker_bug1507893.js b/dom/file/tests/worker_bug1507893.js
new file mode 100644
index 0000000000..06fce2b2ef
--- /dev/null
+++ b/dom/file/tests/worker_bug1507893.js
@@ -0,0 +1,5 @@
+onmessage = e => {
+  fetch(e.data)
+    .then(r => r.blob())
+    .then(blob => postMessage(blob));
+};
diff --git a/dom/file/tests/worker_bug1742540.js b/dom/file/tests/worker_bug1742540.js
new file mode 100644
index 0000000000..c0330ccb56
--- /dev/null
+++ b/dom/file/tests/worker_bug1742540.js
@@ -0,0 +1,5 @@
+onmessage = e => {
+  let file = e.data.file;
+  let port = e.data.port;
+  port.postMessage(e.data.message);
+};
diff --git a/dom/file/tests/worker_fileReader.js b/dom/file/tests/worker_fileReader.js
new file mode 100644
index 0000000000..2e8408d1bb
--- /dev/null
+++ b/dom/file/tests/worker_fileReader.js
@@ -0,0 +1,30 @@
+importScripts("common_fileReader.js");
+
+function ok(a, msg) {
+  postMessage({ type: "check", msg, status: !!a });
+}
+
+function is(a, b, msg) {
+  ok(a === b, msg);
+}
+
+onmessage = event => {
+  let p;
+
+  if (event.data.tests == "basic") {
+    p = runBasicTests(event.data.data);
+  } else if (event.data.tests == "encoding") {
+    p = runEncodingTests(event.data.data);
+  } else if (event.data.tests == "twice") {
+    p = runTwiceTests(event.data.data);
+  } else if (event.data.tests == "other") {
+    p = runOtherTests(event.data.data);
+  } else {
+    postMessage({ type: "error" });
+    return;
+  }
+
+  p.then(() => {
+    postMessage({ type: "finish" });
+  });
+};
diff --git a/dom/file/tests/xpcshell.ini b/dom/file/tests/xpcshell.ini
new file mode 100644
index 0000000000..2f817948d3
--- /dev/null
+++ b/dom/file/tests/xpcshell.ini
@@ -0,0 +1,8 @@
+[DEFAULT]
+
+[test_bloburi.js]
+[test_createFile.js]
+[test_ipc_messagemanager_blob.js]
+skip-if = os == "android"
+[test_agentcluster_bloburl.js]
+skip-if = os == "android"