pass quality argument down the hole

pyppeteer/__init__.py

@@ -11,7 +11,7 @@
 __author__ = """Hiroyuki Takagi"""
 __email__ = 'miyako.dev@gmail.com'
 __version__ = '0.0.25'
-__chromium_revision__ = '588429'
+__chromium_revision__ = '848005'  # https://github.com/puppeteer/puppeteer/releases
 __base_puppeteer_version__ = 'v1.6.0'
 __pyppeteer_home__ = os.environ.get(
     'PYPPETEER_HOME', AppDirs('pyppeteer').user_data_dir)  # type: str

pyppeteer/page.py

@@ -1259,7 +1259,8 @@ async def _screenshotTask(self, format: str, options: dict  # noqa: C901
         await self._client.send('Target.activateTarget', {
             'targetId': self._target._targetId,
         })
-        clip = options.get('clip')
+
+        clip, quality = options.get('clip'), options.get('quality')
         if clip:
             clip['scale'] = 1
 
@@ -1299,6 +1300,9 @@ async def _screenshotTask(self, format: str, options: dict  # noqa: C901
         opt = {'format': format}
         if clip:
             opt['clip'] = clip
+        if format == 'jpeg' and quality is not None:
+            opt['quality'] = quality
+
         result = await self._client.send('Page.captureScreenshot', opt)
 
         if options.get('omitBackground'):