diff --git a/Cargo.lock b/Cargo.lock
index e65b2239f9a..47e75b91e9d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1087,7 +1087,7 @@ dependencies = [
 
 [[package]]
 name = "getopts"
-version = "0.2.14"
+version = "0.2.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -1507,7 +1507,7 @@ dependencies = [
  "traitobject 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "typeable 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicase 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "url 1.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1987,7 +1987,7 @@ dependencies = [
  "string_cache 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "thin-slice 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "url 1.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "webrender_api 0.57.2 (git+https://github.com/servo/webrender)",
  "xml5ever 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2276,7 +2276,7 @@ dependencies = [
  "threadpool 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicase 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "url 1.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "uuid 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "webrender_api 0.57.2 (git+https://github.com/servo/webrender)",
  "ws 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2314,7 +2314,7 @@ dependencies = [
  "servo_arc 0.1.1",
  "servo_config 0.0.1",
  "servo_url 0.0.1",
- "url 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "url 1.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "uuid 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "webrender_api 0.57.2 (git+https://github.com/servo/webrender)",
 ]
@@ -2985,7 +2985,7 @@ dependencies = [
  "time 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
  "tinyfiledialogs 3.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-segmentation 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "url 1.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "utf-8 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "uuid 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "webrender_api 0.57.2 (git+https://github.com/servo/webrender)",
@@ -3071,7 +3071,7 @@ dependencies = [
  "servo_url 0.0.1",
  "style_traits 0.0.1",
  "time 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "url 1.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "webrender_api 0.57.2 (git+https://github.com/servo/webrender)",
  "webvr_traits 0.0.1",
 ]
@@ -3292,7 +3292,7 @@ dependencies = [
  "embedder_traits 0.0.1",
  "env_logger 0.5.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "euclid 0.19.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "getopts 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "getopts 0.2.17 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3300,7 +3300,7 @@ dependencies = [
  "serde 1.0.66 (registry+https://github.com/rust-lang/crates.io-index)",
  "servo_geometry 0.0.1",
  "servo_url 0.0.1",
- "url 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "url 1.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -3350,7 +3350,7 @@ dependencies = [
  "malloc_size_of_derive 0.0.1",
  "serde 1.0.66 (registry+https://github.com/rust-lang/crates.io-index)",
  "servo_rand 0.0.1",
- "url 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "url 1.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "url_serde 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "uuid 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -3803,7 +3803,7 @@ dependencies = [
 
 [[package]]
 name = "url"
-version = "1.6.0"
+version = "1.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "idna 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3817,7 +3817,7 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "serde 1.0.66 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "url 1.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -3938,7 +3938,7 @@ dependencies = [
  "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-segmentation 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "url 1.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -3959,7 +3959,7 @@ dependencies = [
  "script_traits 0.0.1",
  "servo_config 0.0.1",
  "servo_url 0.0.1",
- "url 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "url 1.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "uuid 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "webdriver 0.35.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -4133,7 +4133,7 @@ dependencies = [
  "rand 0.3.22 (registry+https://github.com/rust-lang/crates.io-index)",
  "sha1 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "slab 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "url 1.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -4323,7 +4323,7 @@ dependencies = [
 "checksum fxhash 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "c31b6d751ae2c7f11320402d34e41349dd1016f8d5d45e48c4312bc8625af50c"
 "checksum gaol 0.0.1 (git+https://github.com/servo/gaol)" = "<none>"
 "checksum gdi32-sys 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "0912515a8ff24ba900422ecda800b52f4016a56251922d397c576bf92c690518"
-"checksum getopts 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)" = "d9047cfbd08a437050b363d35ef160452c5fe8ea5187ae0a624708c91581d685"
+"checksum getopts 0.2.17 (registry+https://github.com/rust-lang/crates.io-index)" = "b900c08c1939860ce8b54dc6a89e26e00c04c380fd0e09796799bd7f12861e05"
 "checksum gif 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ff3414b424657317e708489d2857d9575f4403698428b040b609b9d1c1a84a2c"
 "checksum gl_generator 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7a795170cbd85b5a7baa58d6d7525cae6a03e486859860c220f7ebbbdd379d0a"
 "checksum gleam 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "0d41e7ac812597988fdae31c9baec3c6d35cadb8ad9ab88a9bf9c0f119ed66c2"
@@ -4535,7 +4535,7 @@ dependencies = [
 "checksum unicode-width 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "bf3a113775714a22dcb774d8ea3655c53a32debae63a063acc00a91cc586245f"
 "checksum unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
 "checksum unreachable 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "382810877fe448991dfc7f0dd6e3ae5d58088fd0ea5e35189655f84e6814fa56"
-"checksum url 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fa35e768d4daf1d85733418a49fb42e10d7f633e394fccab4ab7aba897053fe2"
+"checksum url 1.6.1 (registry+https://github.com/rust-lang/crates.io-index)" = "23ef1b2df9b1541244318407f1ed96e754dab6efac4121dc1c4c16d38daf215e"
 "checksum url_serde 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "74e7d099f1ee52f823d4bdd60c93c3602043c728f5db3b97bdb548467f7bddea"
 "checksum user32-sys 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "4ef4711d107b21b410a3a974b1204d9accc8b10dad75d8324b5d755de1617d47"
 "checksum utf-8 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)" = "b6f923c601c7ac48ef1d66f7d5b5b2d9a7ba9c51333ab75a3ddf8d0309185a56"
diff --git a/components/layout/table.rs b/components/layout/table.rs
index 658a39d8e21..e36fd4b4e5a 100644
--- a/components/layout/table.rs
+++ b/components/layout/table.rs
@@ -448,9 +448,9 @@ impl Flow for TableFlow {
                         .sum::<f32>();
 
                     for &index in &constrained_column_inline_sizes_indices {
+                        let inline_size = self.column_computed_inline_sizes[index].size.0;
                         self.column_computed_inline_sizes[index].size +=
-                            remaining_inline_size.scale_by(
-                                self.column_computed_inline_sizes[index].size.0 as f32 / total_minimum_size);
+                            remaining_inline_size.scale_by(inline_size as f32 / total_minimum_size);
                     }
                 }
             }
@@ -531,7 +531,7 @@ impl Flow for TableFlow {
         self.block_flow.build_display_list_for_block(state, border_painting_mode);
 
         let iter = TableCellStyleIterator::new(&self);
-        for mut style in iter {
+        for style in iter {
             style.build_display_list(state)
         }
     }
@@ -964,7 +964,7 @@ impl<'a> Iterator for TableRowAndGroupIterator<'a> {
         match self.kids.next() {
             Some(kid) => {
                 if kid.is_table_rowgroup() {
-                    let mut rowgroup = kid.as_table_rowgroup();
+                    let rowgroup = kid.as_table_rowgroup();
                     let iter = rowgroup.block_flow.base.child_iter();
                     self.group = Some((&rowgroup.block_flow.fragment, iter));
                     self.next()
@@ -1010,7 +1010,7 @@ impl<'a> Iterator for MutTableRowAndGroupIterator<'a> {
         match self.kids.next() {
             Some(kid) => {
                 if kid.is_table_rowgroup() {
-                    let mut rowgroup = kid.as_mut_table_rowgroup();
+                    let rowgroup = kid.as_mut_table_rowgroup();
                     let iter = rowgroup.block_flow.base.child_iter_mut();
                     self.group = Some((&rowgroup.block_flow.fragment, iter));
                     self.next()
diff --git a/components/script/dom/imagedata.rs b/components/script/dom/imagedata.rs
index 9e80d86d089..e80914d8aea 100644
--- a/components/script/dom/imagedata.rs
+++ b/components/script/dom/imagedata.rs
@@ -65,7 +65,7 @@ impl ImageData {
         if let Some(jsobject) = opt_jsobject {
             let cx = global.get_cx();
             typedarray!(in(cx) let array_res: Uint8ClampedArray = jsobject);
-            let mut array = array_res
+            let array = array_res
                 .map_err(|_| Error::Type("Argument to Image data is not an Uint8ClampedArray".to_owned()))?;
 
             let byte_len = array.as_slice().len() as u32;
diff --git a/components/script/dom/webglrenderingcontext.rs b/components/script/dom/webglrenderingcontext.rs
index 3c2f5f459cb..4aa6c047a1b 100644
--- a/components/script/dom/webglrenderingcontext.rs
+++ b/components/script/dom/webglrenderingcontext.rs
@@ -1907,7 +1907,7 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
 
         typedarray!(in(cx) let array_buffer: ArrayBuffer = data);
         let data_vec = match array_buffer {
-            Ok(mut data) => data.to_vec(),
+            Ok(data) => data.to_vec(),
             Err(_) => fallible_array_buffer_view_to_vec(cx, data)?,
         };
 
@@ -1944,8 +1944,8 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
     fn BufferSubData(&self, target: u32, offset: i64, data: ArrayBufferViewOrArrayBuffer) {
         let data_vec = match data {
             // Typed array is rooted, so we can safely temporarily retrieve its slice
-            ArrayBufferViewOrArrayBuffer::ArrayBuffer(mut inner) => inner.to_vec(),
-            ArrayBufferViewOrArrayBuffer::ArrayBufferView(mut inner) => inner.to_vec(),
+            ArrayBufferViewOrArrayBuffer::ArrayBuffer(inner) => inner.to_vec(),
+            ArrayBufferViewOrArrayBuffer::ArrayBufferView(inner) => inner.to_vec(),
         };
 
         let bound_buffer = handle_potential_webgl_error!(self, self.bound_buffer(target), return);
diff --git a/components/script/dom/window.rs b/components/script/dom/window.rs
index 48b0861216c..e125aa87fd9 100644
--- a/components/script/dom/window.rs
+++ b/components/script/dom/window.rs
@@ -1153,7 +1153,7 @@ impl Window {
     pub fn cancel_all_tasks(&self) {
         let mut ignore_flags = self.ignore_further_async_events.borrow_mut();
         for task_source_name in TaskSourceName::all() {
-            let mut flag = ignore_flags.entry(task_source_name).or_insert(Default::default());
+            let flag = ignore_flags.entry(task_source_name).or_insert(Default::default());
             let cancelled = mem::replace(&mut *flag, Default::default());
             cancelled.store(true, Ordering::Relaxed);
         }
diff --git a/etc/run_in_headless_android_emulator.py b/etc/run_in_headless_android_emulator.py
index 1d2959e4f06..c76ea3b71e7 100755
--- a/etc/run_in_headless_android_emulator.py
+++ b/etc/run_in_headless_android_emulator.py
@@ -176,12 +176,17 @@ def extract_arg(name, args):
 
 
 def extract_args(name, args):
+    assert "=" not in name
     previous_arg_matches = False
     for i, arg in enumerate(args):
         if previous_arg_matches:
             yield i, arg
         previous_arg_matches = arg == name
 
+        arg, sep, value = arg.partition("=")
+        if arg == name and sep == "=":
+            yield i, value
+
 
 def wait_for_tcp_server(adb, port):
     while call(adb + ["shell", "nc -z 127.0.0.1 %s" % port], stdout=sys.stderr) != 0:
diff --git a/etc/start_servo.py b/etc/start_servo.py
index 9954d3ab091..a3815e0dc1a 100644
--- a/etc/start_servo.py
+++ b/etc/start_servo.py
@@ -19,6 +19,6 @@ def start_servo(port, resolution):
 
     # Use the below command if you are running this script on windows
     # cmds = 'mach.bat run --webdriver ' + port + ' --resolution ' + resolution
-    cmds = './mach run --webdriver ' + port + ' --resolution ' + resolution
+    cmds = './mach run --webdriver=' + port + ' --resolution ' + resolution
     process = subprocess.Popen(cmds, shell=True, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
     return process
diff --git a/tests/wpt/metadata/MANIFEST.json b/tests/wpt/metadata/MANIFEST.json
index f0237e19550..d798465afde 100644
--- a/tests/wpt/metadata/MANIFEST.json
+++ b/tests/wpt/metadata/MANIFEST.json
@@ -642566,7 +642566,7 @@
    "support"
   ],
   "tools/wptrunner/wptrunner/browsers/servodriver.py": [
-   "6486a788b8c8fbf4fc52dd4368265571975cabb4",
+   "d788effc469bc2f582ba7ead65700e7a13c37c59",
    "support"
   ],
   "tools/wptrunner/wptrunner/browsers/webkit.py": [
@@ -642814,7 +642814,7 @@
    "support"
   ],
   "tools/wptrunner/wptrunner/webdriver_server.py": [
-   "9ecd009a7d8127ed793d4ef0aff19f6161bbd1ec",
+   "4ec415ce78bb89a82d5f098b1c4e8560e7ec39e4",
    "support"
   ],
   "tools/wptrunner/wptrunner/wptcommandline.py": [
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/browsers/servodriver.py b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/browsers/servodriver.py
index 6486a788b8c..d788effc469 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/browsers/servodriver.py
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/browsers/servodriver.py
@@ -106,7 +106,7 @@ class ServoWebDriverBrowser(Browser):
             self.binary,
             self.binary_args + [
                 "--hard-fail",
-                "--webdriver", str(self.webdriver_port),
+                "--webdriver=%s" % self.webdriver_port,
                 "about:blank",
             ],
             self.debug_info
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/webdriver_server.py b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/webdriver_server.py
index 9ecd009a7d8..4ec415ce78b 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/webdriver_server.py
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/webdriver_server.py
@@ -197,7 +197,7 @@ class ServoDriverServer(WebDriverServer):
 
     def make_command(self):
         command = [self.binary,
-                   "--webdriver", str(self.port),
+                   "--webdriver=%s" % self.port,
                    "--hard-fail",
                    "--headless"] + self._args
         if self.binary_args: