feat: add FormData class for form and multipart requests

.azure-pipelines/publish.yml

@@ -60,7 +60,7 @@ extends:
             targetPath: $(Build.ArtifactStagingDirectory)/esrp-build
         steps:
           - checkout: none
-          - task: EsrpRelease@9
+          - task: EsrpRelease@11
             inputs:
               connectedservicename: 'Playwright-ESRP-PME'
               usemanagedidentity: true

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
     name: Lint
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up Python
       uses: actions/setup-python@v6
       with:
@@ -91,7 +91,7 @@ jobs:
           browser: chromium
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up Python
       uses: actions/setup-python@v6
       with:
@@ -138,7 +138,7 @@ jobs:
           browser-channel: msedge
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up Python
       uses: actions/setup-python@v6
       with:
@@ -181,11 +181,11 @@ jobs:
         # where the default shell is pwsh and skips the activation hooks.
         shell: bash -el {0}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - name: Get conda
-        uses: conda-incubator/setup-miniconda@v3
+        uses: conda-incubator/setup-miniconda@v4
         with:
           python-version: '3.12'
           channels: conda-forge
@@ -202,7 +202,7 @@ jobs:
       run:
         working-directory: examples/todomvc/
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up Python
       uses: actions/setup-python@v6
       with:

.github/workflows/publish.yml

@@ -22,14 +22,14 @@ jobs:
     runs-on: ${{ matrix.os }}
     defaults:
       run:
-        # Required for conda-incubator/setup-miniconda@v3
+        # Required for conda-incubator/setup-miniconda@v4
         shell: bash -el {0}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - name: Get conda
-        uses: conda-incubator/setup-miniconda@v3
+        uses: conda-incubator/setup-miniconda@v4
         with:
           python-version: '3.12'
           channels: conda-forge

.github/workflows/publish_docker.yml

@@ -15,9 +15,9 @@ jobs:
       contents: read    # This is required for actions/checkout to succeed
     environment: Docker
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Azure login
-      uses: azure/login@v2
+      uses: azure/login@v3
       with:
         client-id: ${{ secrets.AZURE_DOCKER_CLIENT_ID }}
         tenant-id: ${{ secrets.AZURE_DOCKER_TENANT_ID }}
@@ -29,7 +29,7 @@ jobs:
       with:
         python-version: "3.10"
     - name: Set up Docker QEMU for arm64 docker builds
-      uses: docker/setup-qemu-action@v3
+      uses: docker/setup-qemu-action@v4
       with:
         platforms: arm64
     - name: Install dependencies & browsers

.github/workflows/test_docker.yml

@@ -30,7 +30,7 @@ jobs:
           - ubuntu-24.04
           - ubuntu-24.04-arm
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up Python
       uses: actions/setup-python@v6
       with:

CLAUDE.md

@@ -48,10 +48,51 @@ This is the recurring high-stakes task. Use the dedicated skill:
 
 It documents the full process: the upstream commit-range diff over `docs/src/api/`, how to classify each commit (PORT / MISMATCH / N/A), how to handle the `langs:` filter, the recurring failure modes, and the tests/sync-mirroring conventions.
 
+## Working on PRs
+
+- Never post comments, replies, or reviews on GitHub PRs/issues under my account without my explicit approval. Draft the proposed text and wait for me to approve before sending.
+
 ## House style
 
 - Don't hand-edit generated files.
 - Don't add `# type: ignore` or modify `_generated.py` to silence pyright; fix the source of the mismatch.
 - New public methods on impl classes need a sync test mirror under `tests/sync/`.
 - Keep `expected_api_mismatch.txt` minimal — every entry needs a one-line rationale comment above it.
 - Prefer `locals_to_params(locals())` for forwarding optional kwargs to channel sends, matching the rest of the codebase.
+
+## Commit Convention
+
+Before committing, run `mypy playwright` and fix errors.
+
+Semantic commit messages: `label(scope): description`
+
+Labels: `fix`, `feat`, `chore`, `docs`, `test`, `devops`
+
+```bash
+git checkout -b fix-12345
+# ... make changes ...
+git add <changed-files>
+git commit -m "$(cat <<'EOF'
+fix(asyncio): do not deadlock in atexit handler
+
+Fixes: https://github.com/microsoft/playwright-python/issues/12345
+EOF
+)"
+git push origin fix-12345
+gh pr create --repo microsoft/playwright-python --head username:fix-12345 \
+  --title "fix(asyncio): do not deadlock in atexit handler" \
+  --body "$(cat <<'EOF'
+## Summary
+- <describe the change very! briefly>
+
+Fixes https://github.com/microsoft/playwright-python/issues/12345
+EOF
+)"
+```
+
+Never add Co-Authored-By agents in commit message.
+Never add "Generated with" in commit message.
+Never add test plan to PR description. Keep PR description short — a few bullet points at most.
+Branch naming for issue fixes: `fix-<issue-number>`
+
+**Never `git push` without an explicit instruction to push.** Applies even when a PR is already open for the branch — additional commits are immediately visible to reviewers. Commit locally, report what was committed, and wait. Only push when the user's message contains "push", "upload", "create PR", "ship it", or equivalent.

README.md

@@ -4,9 +4,9 @@ Playwright is a Python library to automate [Chromium](https://www.chromium.org/H
 
 |          | Linux | macOS | Windows |
 |   :---   | :---: | :---: | :---:   |
-| Chromium <!-- GEN:chromium-version -->147.0.7727.15<!-- GEN:stop --> | ✅ | ✅ | ✅ |
+| Chromium <!-- GEN:chromium-version -->148.0.7778.96<!-- GEN:stop --> | ✅ | ✅ | ✅ |
 | WebKit <!-- GEN:webkit-version -->26.4<!-- GEN:stop --> | ✅ | ✅ | ✅ |
-| Firefox <!-- GEN:firefox-version -->148.0.2<!-- GEN:stop --> | ✅ | ✅ | ✅ |
+| Firefox <!-- GEN:firefox-version -->150.0.2<!-- GEN:stop --> | ✅ | ✅ | ✅ |
 
 ## Documentation
 

local-requirements.txt

@@ -1,16 +1,17 @@
+asyncio-atexit==1.0.1
 autobahn==23.1.2
 black==25.1.0
 build==1.3.0
-flake8==7.2.0
+flake8==7.3.0
 mypy==1.17.1
 objgraph==3.6.2
 Pillow==11.3.0
 pixelmatch==0.3.0
 pre-commit==3.5.0
-pyOpenSSL==25.1.0
+pyOpenSSL==26.0.0
 pytest==8.4.1
 pytest-asyncio==1.1.0
-pytest-cov==6.3.0
+pytest-cov==7.1.0
 pytest-repeat==0.9.4
 pytest-rerunfailures==15.1
 pytest-timeout==2.4.0
@@ -19,4 +20,4 @@ requests==2.32.5
 service_identity==24.2.0
 twisted==25.5.0
 types-pyOpenSSL==24.1.0.20240722
-types-requests==2.32.4.20250809
+types-requests==2.32.4.20260107

playwright/_impl/_api_structures.py

@@ -151,16 +151,31 @@ class ViewportSize(TypedDict):
 
 class SourceLocation(TypedDict):
     url: str
+    line: int
+    column: int
     lineNumber: int
     columnNumber: int
 
 
+class WebErrorLocation(TypedDict):
+    url: str
+    line: int
+    column: int
+
+
 class FilePayload(TypedDict):
     name: str
     mimeType: str
     buffer: bytes
 
 
+class DropPayload(TypedDict, total=False):
+    files: Optional[
+        Union[str, Path, FilePayload, Sequence[Union[str, Path]], Sequence[FilePayload]]
+    ]
+    data: Optional[Dict[str, str]]
+
+
 class RemoteAddr(TypedDict):
     ipAddress: str
     port: int
@@ -216,6 +231,7 @@ class FrameExpectOptions(TypedDict, total=False):
     useInnerText: Optional[bool]
     isNot: bool
     timeout: Optional[float]
+    pseudo: Optional[str]
 
 
 class FrameExpectResult(TypedDict):
@@ -330,3 +346,5 @@ class DebuggerPausedDetails(TypedDict):
 
 class ScreencastFrame(TypedDict):
     data: bytes
+    viewportWidth: int
+    viewportHeight: int

playwright/_impl/_assertions.py

@@ -13,7 +13,7 @@
 # limitations under the License.
 
 import collections.abc
-from typing import Any, List, Optional, Pattern, Sequence, Union
+from typing import Any, List, Literal, Optional, Pattern, Sequence, Union
 from urllib.parse import urljoin
 
 from playwright._impl._api_structures import (
@@ -26,6 +26,7 @@
 from playwright._impl._errors import Error
 from playwright._impl._fetch import APIResponse
 from playwright._impl._helper import is_textual_mime_type
+from playwright._impl._js_handle import parse_value
 from playwright._impl._locator import Locator
 from playwright._impl._page import Page
 from playwright._impl._str_utils import escape_regex_flags
@@ -71,7 +72,14 @@ async def _expect_impl(
             del expect_options["useInnerText"]
         result = await self._call_expect(expression, expect_options, title)
         if result["matches"] == self._is_not:
-            actual = result.get("received")
+            received = result.get("received") or {}
+            if isinstance(received, dict):
+                if "value" in received and received["value"] is not None:
+                    actual = parse_value(received["value"])
+                else:
+                    actual = received.get("ariaSnapshot")
+            else:
+                actual = received
             if self._custom_message:
                 out_message = self._custom_message
                 if expected is not None:
@@ -161,6 +169,24 @@ async def not_to_have_url(
         __tracebackhide__ = True
         await self._not.to_have_url(urlOrRegExp, timeout, ignoreCase)
 
+    async def to_match_aria_snapshot(
+        self, expected: str, timeout: float = None
+    ) -> None:
+        __tracebackhide__ = True
+        await self._expect_impl(
+            "to.match.aria",
+            FrameExpectOptions(expectedValue=expected, timeout=timeout),
+            expected,
+            "Page expected to match Aria snapshot",
+            'Expect "to_match_aria_snapshot"',
+        )
+
+    async def not_to_match_aria_snapshot(
+        self, expected: str, timeout: float = None
+    ) -> None:
+        __tracebackhide__ = True
+        await self._not.to_match_aria_snapshot(expected, timeout)
+
 
 class LocatorAssertions(AssertionsBase):
     def __init__(
@@ -400,13 +426,17 @@ async def to_have_css(
         name: str,
         value: Union[str, Pattern[str]],
         timeout: float = None,
+        pseudo: Literal["after", "before"] = None,
     ) -> None:
         __tracebackhide__ = True
         expected_text = to_expected_text_values([value])
         await self._expect_impl(
             "to.have.css",
             FrameExpectOptions(
-                expressionArg=name, expectedText=expected_text, timeout=timeout
+                expressionArg=name,
+                expectedText=expected_text,
+                timeout=timeout,
+                pseudo=pseudo,
             ),
             value,
             "Locator expected to have CSS",

playwright/_impl/_browser.py

@@ -59,6 +59,7 @@
 
 class Browser(ChannelOwner):
     Events = SimpleNamespace(
+        Context="context",
         Disconnected="disconnected",
     )
 
@@ -104,6 +105,7 @@ def _did_create_context(self, context: BrowserContext) -> None:
         # and will be configured later in `ConnectToBrowserType`.
         if self._browser_type:
             self._setup_browser_context(context)
+        self.emit(Browser.Events.Context, context)
 
     def _setup_browser_context(self, context: BrowserContext) -> None:
         context._tracing._traces_dir = self._traces_dir