Browser

extends: EventEmitter

A Browser is created via browser_type.launch(). An example of using a Browser to create a Page:

Sync
Async

from playwright.sync_api import sync_playwright, Playwright

def run(playwright: Playwright):
    firefox = playwright.firefox
    browser = firefox.launch()
    page = browser.new_page()
    page.goto("https://example.com")
    browser.close()

with sync_playwright() as playwright:
    run(playwright)

import asyncio
from playwright.async_api import async_playwright, Playwright

async def run(playwright: Playwright):
    firefox = playwright.firefox
    browser = await firefox.launch()
    page = await browser.new_page()
    await page.goto("https://example.com")
    await browser.close()

async def main():
    async with async_playwright() as playwright:
        await run(playwright)
asyncio.run(main())

Methods

close

Added in: v1.8

browser.close

In case this browser is obtained using browser_type.launch(), closes the browser and all of its pages (if any were opened).

In case this browser is connected to, clears all created contexts belonging to this browser and disconnects from the browser server.

note

This is similar to force quitting the browser. Therefore, you should call browser_context.close() on any BrowserContext's you explicitly created earlier with browser.new_context() before calling browser.close().

The Browser object itself is considered to be disposed and cannot be used anymore.

Usage

browser.close()
browser.close(**kwargs)

Arguments

reason str (optional) Added in: v1.40#

The reason to be reported to the operations interrupted by the browser closure.

Returns

NoneType #

new_browser_cdp_session

Added in: v1.11

browser.new_browser_cdp_session

note

CDP Sessions are only supported on Chromium-based browsers.

Returns the newly created browser session.

Usage

browser.new_browser_cdp_session()

Returns

CDPSession #

new_context

Added in: v1.8

browser.new_context

Creates a new browser context. It won't share cookies/cache with other browser contexts.

note

If directly using this method to create BrowserContexts, it is best practice to explicitly close the returned context via browser_context.close() when your code is done with the BrowserContext, and before calling browser.close(). This will ensure the context is closed gracefully and any artifacts—like HARs and videos—are fully flushed and saved.

Usage

Sync
Async

browser = playwright.firefox.launch() # or "chromium" or "webkit".
# create a new incognito browser context.
context = browser.new_context()
# create a new page in a pristine context.
page = context.new_page()
page.goto("https://example.com")

# gracefully close up everything
context.close()
browser.close()

browser = await playwright.firefox.launch() # or "chromium" or "webkit".
# create a new incognito browser context.
context = await browser.new_context()
# create a new page in a pristine context.
page = await context.new_page()
await page.goto("https://example.com")

# gracefully close up everything
await context.close()
await browser.close()

Arguments

accept_downloads bool (optional)#

Whether to automatically download all the attachments. Defaults to true where all the downloads are accepted.
base_url str (optional)#

When using page.goto(), page.route(), page.wait_for_url(), page.expect_request(), or page.expect_response() it takes the base URL in consideration by using the URL() constructor for building the corresponding URL. Unset by default. Examples:
- baseURL: http://localhost:3000 and navigating to /bar.html results in http://localhost:3000/bar.html
- baseURL: http://localhost:3000/foo/ and navigating to ./bar.html results in http://localhost:3000/foo/bar.html
- baseURL: http://localhost:3000/foo (without trailing slash) and navigating to ./bar.html results in http://localhost:3000/bar.html
bypass_csp bool (optional)#

Toggles bypassing page's Content-Security-Policy. Defaults to false.
color_scheme "light"|"dark"|"no-preference"|"null" (optional)#

Emulates 'prefers-colors-scheme' media feature, supported values are 'light', 'dark', 'no-preference'. See page.emulate_media() for more details. Passing 'null' resets emulation to system defaults. Defaults to 'light'.
device_scale_factor float (optional)#

Specify device scale factor (can be thought of as dpr). Defaults to 1. Learn more about emulating devices with device scale factor.
extra_http_headers Dict[str, str] (optional)#

An object containing additional HTTP headers to be sent with every request. Defaults to none.
forced_colors "active"|"none"|"null" (optional)#

Emulates 'forced-colors' media feature, supported values are 'active', 'none'. See page.emulate_media() for more details. Passing 'null' resets emulation to system defaults. Defaults to 'none'.
geolocation Dict (optional)#
- latitude float
  
  Latitude between -90 and 90.
- longitude float
  
  Longitude between -180 and 180.
- accuracy float (optional)
  
  Non-negative accuracy value. Defaults to 0.
has_touch bool (optional)#

Specifies if viewport supports touch events. Defaults to false. Learn more about mobile emulation.
http_credentials Dict (optional)#
- username str
- password str
- origin str (optional)
  
  Restrain sending http credentials on specific origin (scheme://host:port).
Credentials for HTTP authentication. If no origin is specified, the username and password are sent to any servers upon unauthorized responses.
ignore_https_errors bool (optional)#

Whether to ignore HTTPS errors when sending network requests. Defaults to false.
is_mobile bool (optional)#

Whether the meta viewport tag is taken into account and touch events are enabled. isMobile is a part of device, so you don't actually need to set it manually. Defaults to false and is not supported in Firefox. Learn more about mobile emulation.
java_script_enabled bool (optional)#

Whether or not to enable JavaScript in the context. Defaults to true. Learn more about disabling JavaScript.
locale str (optional)#

Specify user locale, for example en-GB, de-DE, etc. Locale will affect navigator.language value, Accept-Language request header value as well as number and date formatting rules. Defaults to the system default locale. Learn more about emulation in our emulation guide.
no_viewport bool (optional)#

Does not enforce fixed viewport, allows resizing window in the headed mode.
offline bool (optional)#

Whether to emulate network being offline. Defaults to false. Learn more about network emulation.
permissions List[str] (optional)#

A list of permissions to grant to all pages in this context. See browser_context.grant_permissions() for more details. Defaults to none.
proxy Dict (optional)#
- server str
  
  Proxy to be used for all requests. HTTP and SOCKS proxies are supported, for example http://myproxy.com:3128 or socks5://myproxy.com:3128. Short form myproxy.com:3128 is considered an HTTP proxy.
- bypass str (optional)
  
  Optional comma-separated domains to bypass proxy, for example ".com, chromium.org, .domain.com".
- username str (optional)
  
  Optional username to use if HTTP proxy requires authentication.
- password str (optional)
  
  Optional password to use if HTTP proxy requires authentication.
Network proxy settings to use with this context. Defaults to none.

note
For Chromium on Windows the browser needs to be launched with the global proxy for this option to work. If all contexts override the proxy, global proxy will be never used and can be any string, for example launch({ proxy: { server: 'http://per-context' } }).
record_har_content "omit"|"embed"|"attach" (optional)#

Optional setting to control resource content management. If omit is specified, content is not persisted. If attach is specified, resources are persisted as separate files and all of these files are archived along with the HAR file. Defaults to embed, which stores content inline the HAR file as per HAR specification.
record_har_mode "full"|"minimal" (optional)#

When set to minimal, only record information necessary for routing from HAR. This omits sizes, timing, page, cookies, security and other types of HAR information that are not used when replaying from HAR. Defaults to full.
record_har_omit_content bool (optional)#

Optional setting to control whether to omit request content from the HAR. Defaults to false.
record_har_path Union[str, pathlib.Path] (optional)#

Enables HAR recording for all pages into the specified HAR file on the filesystem. If not specified, the HAR is not recorded. Make sure to call browser_context.close() for the HAR to be saved.
record_har_url_filter str|Pattern (optional)#
record_video_dir Union[str, pathlib.Path] (optional)#

Enables video recording for all pages into the specified directory. If not specified videos are not recorded. Make sure to call browser_context.close() for videos to be saved.
record_video_size Dict (optional)#
- width int
  
  Video frame width.
- height int
  
  Video frame height.
Dimensions of the recorded videos. If not specified the size will be equal to viewport scaled down to fit into 800x800. If viewport is not configured explicitly the video size defaults to 800x450. Actual picture of each page will be scaled down if necessary to fit the specified size.
reduced_motion "reduce"|"no-preference"|"null" (optional)#

Emulates 'prefers-reduced-motion' media feature, supported values are 'reduce', 'no-preference'. See page.emulate_media() for more details. Passing 'null' resets emulation to system defaults. Defaults to 'no-preference'.
screen Dict (optional)#
- width int
  
  page width in pixels.
- height int
  
  page height in pixels.
Emulates consistent window screen size available inside web page via window.screen. Is only used when the viewport is set.
service_workers "allow"|"block" (optional)#

Whether to allow sites to register Service workers. Defaults to 'allow'.
- 'allow': Service Workers can be registered.
- 'block': Playwright will block all registration of Service Workers.
storage_state Union[str, pathlib.Path]|Dict (optional)#
- cookies List[Dict]
  - name str
  - value str
  - domain str
    
    Domain and path are required. For the cookie to apply to all subdomains as well, prefix domain with a dot, like this: ".example.com"
  - path str
    
    Domain and path are required
  - expires float
    
    Unix time in seconds.
  - httpOnly bool
  - secure bool
  - sameSite "Strict"|"Lax"|"None"
    
    sameSite flag
  Cookies to set for context
- origins List[Dict]
  - origin str
  - localStorage List[Dict]
    - name str
    - value str
  localStorage to set for context
Learn more about storage state and auth.

Populates context with given storage state. This option can be used to initialize context with logged-in information obtained via browser_context.storage_state().
strict_selectors bool (optional)#

If set to true, enables strict selectors mode for this context. In the strict selectors mode all operations on selectors that imply single target DOM element will throw when more than one element matches the selector. This option does not affect any Locator APIs (Locators are always strict). Defaults to false. See Locator to learn more about the strict mode.
timezone_id str (optional)#

Changes the timezone of the context. See ICU's metaZones.txt for a list of supported timezone IDs. Defaults to the system timezone.
user_agent str (optional)#

Specific user agent to use in this context.
viewport NoneType|Dict (optional)#
- width int
  
  page width in pixels.
- height int
  
  page height in pixels.
Sets a consistent viewport for each page. Defaults to an 1280x720 viewport. no_viewport disables the fixed viewport. Learn more about viewport emulation.

Returns

BrowserContext #

new_page

Added in: v1.8

browser.new_page

Creates a new page in a new browser context. Closing this page will close the context as well.

This is a convenience API that should only be used for the single-page scenarios and short snippets. Production code and testing frameworks should explicitly create browser.new_context() followed by the browser_context.new_page() to control their exact life times.

Usage

browser.new_page()
browser.new_page(**kwargs)

Arguments

accept_downloads bool (optional)#

Whether to automatically download all the attachments. Defaults to true where all the downloads are accepted.
base_url str (optional)#

When using page.goto(), page.route(), page.wait_for_url(), page.expect_request(), or page.expect_response() it takes the base URL in consideration by using the URL() constructor for building the corresponding URL. Unset by default. Examples:
- baseURL: http://localhost:3000 and navigating to /bar.html results in http://localhost:3000/bar.html
- baseURL: http://localhost:3000/foo/ and navigating to ./bar.html results in http://localhost:3000/foo/bar.html
- baseURL: http://localhost:3000/foo (without trailing slash) and navigating to ./bar.html results in http://localhost:3000/bar.html
bypass_csp bool (optional)#

Toggles bypassing page's Content-Security-Policy. Defaults to false.
color_scheme "light"|"dark"|"no-preference"|"null" (optional)#

Emulates 'prefers-colors-scheme' media feature, supported values are 'light', 'dark', 'no-preference'. See page.emulate_media() for more details. Passing 'null' resets emulation to system defaults. Defaults to 'light'.
device_scale_factor float (optional)#

Specify device scale factor (can be thought of as dpr). Defaults to 1. Learn more about emulating devices with device scale factor.
extra_http_headers Dict[str, str] (optional)#

An object containing additional HTTP headers to be sent with every request. Defaults to none.
forced_colors "active"|"none"|"null" (optional)#

Emulates 'forced-colors' media feature, supported values are 'active', 'none'. See page.emulate_media() for more details. Passing 'null' resets emulation to system defaults. Defaults to 'none'.
geolocation Dict (optional)#
- latitude float
  
  Latitude between -90 and 90.
- longitude float
  
  Longitude between -180 and 180.
- accuracy float (optional)
  
  Non-negative accuracy value. Defaults to 0.
has_touch bool (optional)#

Specifies if viewport supports touch events. Defaults to false. Learn more about mobile emulation.
http_credentials Dict (optional)#
- username str
- password str
- origin str (optional)
  
  Restrain sending http credentials on specific origin (scheme://host:port).
Credentials for HTTP authentication. If no origin is specified, the username and password are sent to any servers upon unauthorized responses.
ignore_https_errors bool (optional)#

Whether to ignore HTTPS errors when sending network requests. Defaults to false.
is_mobile bool (optional)#

Whether the meta viewport tag is taken into account and touch events are enabled. isMobile is a part of device, so you don't actually need to set it manually. Defaults to false and is not supported in Firefox. Learn more about mobile emulation.
java_script_enabled bool (optional)#

Whether or not to enable JavaScript in the context. Defaults to true. Learn more about disabling JavaScript.
locale str (optional)#

Specify user locale, for example en-GB, de-DE, etc. Locale will affect navigator.language value, Accept-Language request header value as well as number and date formatting rules. Defaults to the system default locale. Learn more about emulation in our emulation guide.
no_viewport bool (optional)#

Does not enforce fixed viewport, allows resizing window in the headed mode.
offline bool (optional)#

Whether to emulate network being offline. Defaults to false. Learn more about network emulation.
permissions List[str] (optional)#

A list of permissions to grant to all pages in this context. See browser_context.grant_permissions() for more details. Defaults to none.
proxy Dict (optional)#
- server str
  
  Proxy to be used for all requests. HTTP and SOCKS proxies are supported, for example http://myproxy.com:3128 or socks5://myproxy.com:3128. Short form myproxy.com:3128 is considered an HTTP proxy.
- bypass str (optional)
  
  Optional comma-separated domains to bypass proxy, for example ".com, chromium.org, .domain.com".
- username str (optional)
  
  Optional username to use if HTTP proxy requires authentication.
- password str (optional)
  
  Optional password to use if HTTP proxy requires authentication.
Network proxy settings to use with this context. Defaults to none.

note
For Chromium on Windows the browser needs to be launched with the global proxy for this option to work. If all contexts override the proxy, global proxy will be never used and can be any string, for example launch({ proxy: { server: 'http://per-context' } }).
record_har_content "omit"|"embed"|"attach" (optional)#

Optional setting to control resource content management. If omit is specified, content is not persisted. If attach is specified, resources are persisted as separate files and all of these files are archived along with the HAR file. Defaults to embed, which stores content inline the HAR file as per HAR specification.
record_har_mode "full"|"minimal" (optional)#

When set to minimal, only record information necessary for routing from HAR. This omits sizes, timing, page, cookies, security and other types of HAR information that are not used when replaying from HAR. Defaults to full.
record_har_omit_content bool (optional)#

Optional setting to control whether to omit request content from the HAR. Defaults to false.
record_har_path Union[str, pathlib.Path] (optional)#

Enables HAR recording for all pages into the specified HAR file on the filesystem. If not specified, the HAR is not recorded. Make sure to call browser_context.close() for the HAR to be saved.
record_har_url_filter str|Pattern (optional)#
record_video_dir Union[str, pathlib.Path] (optional)#

Enables video recording for all pages into the specified directory. If not specified videos are not recorded. Make sure to call browser_context.close() for videos to be saved.
record_video_size Dict (optional)#
- width int
  
  Video frame width.
- height int
  
  Video frame height.
Dimensions of the recorded videos. If not specified the size will be equal to viewport scaled down to fit into 800x800. If viewport is not configured explicitly the video size defaults to 800x450. Actual picture of each page will be scaled down if necessary to fit the specified size.
reduced_motion "reduce"|"no-preference"|"null" (optional)#

Emulates 'prefers-reduced-motion' media feature, supported values are 'reduce', 'no-preference'. See page.emulate_media() for more details. Passing 'null' resets emulation to system defaults. Defaults to 'no-preference'.
screen Dict (optional)#
- width int
  
  page width in pixels.
- height int
  
  page height in pixels.
Emulates consistent window screen size available inside web page via window.screen. Is only used when the viewport is set.
service_workers "allow"|"block" (optional)#

Whether to allow sites to register Service workers. Defaults to 'allow'.
- 'allow': Service Workers can be registered.
- 'block': Playwright will block all registration of Service Workers.
storage_state Union[str, pathlib.Path]|Dict (optional)#
- cookies List[Dict]
  - name str
  - value str
  - domain str
    
    Domain and path are required. For the cookie to apply to all subdomains as well, prefix domain with a dot, like this: ".example.com"
  - path str
    
    Domain and path are required
  - expires float
    
    Unix time in seconds.
  - httpOnly bool
  - secure bool
  - sameSite "Strict"|"Lax"|"None"
    
    sameSite flag
  Cookies to set for context
- origins List[Dict]
  - origin str
  - localStorage List[Dict]
    - name str
    - value str
  localStorage to set for context
Learn more about storage state and auth.

Populates context with given storage state. This option can be used to initialize context with logged-in information obtained via browser_context.storage_state().
strict_selectors bool (optional)#

If set to true, enables strict selectors mode for this context. In the strict selectors mode all operations on selectors that imply single target DOM element will throw when more than one element matches the selector. This option does not affect any Locator APIs (Locators are always strict). Defaults to false. See Locator to learn more about the strict mode.
timezone_id str (optional)#

Changes the timezone of the context. See ICU's metaZones.txt for a list of supported timezone IDs. Defaults to the system timezone.
user_agent str (optional)#

Specific user agent to use in this context.
viewport NoneType|Dict (optional)#
- width int
  
  page width in pixels.
- height int
  
  page height in pixels.
Sets a consistent viewport for each page. Defaults to an 1280x720 viewport. no_viewport disables the fixed viewport. Learn more about viewport emulation.

Returns

Page #

start_tracing

Added in: v1.11

browser.start_tracing

note

This API controls Chromium Tracing which is a low-level chromium-specific debugging tool. API to control Playwright Tracing could be found here.

You can use browser.start_tracing() and browser.stop_tracing() to create a trace file that can be opened in Chrome DevTools performance panel.

Usage

Sync
Async

browser.start_tracing(page, path="trace.json")
page.goto("https://www.google.com")
browser.stop_tracing()

await browser.start_tracing(page, path="trace.json")
await page.goto("https://www.google.com")
await browser.stop_tracing()

Arguments

page Page (optional)#

Optional, if specified, tracing includes screenshots of the given page.
categories List[str] (optional)#

specify custom categories to use instead of default.
path Union[str, pathlib.Path] (optional)#

A path to write the trace file to.
screenshots bool (optional)#

captures screenshots in the trace.

Returns

NoneType #

stop_tracing

Added in: v1.11

browser.stop_tracing

note

This API controls Chromium Tracing which is a low-level chromium-specific debugging tool. API to control Playwright Tracing could be found here.

Returns the buffer with trace data.

Usage

browser.stop_tracing()

Returns

bytes #

Properties

browser_type

Added in: v1.23

browser.browser_type

Get the browser type (chromium, firefox or webkit) that the browser belongs to.

Usage

browser.browser_type

Returns

BrowserType #

contexts

Added in: v1.8

browser.contexts

Returns an array of all open browser contexts. In a newly created browser, this will return zero browser contexts.

Usage

Sync
Async

browser = pw.webkit.launch()
print(len(browser.contexts())) # prints `0`
context = browser.new_context()
print(len(browser.contexts())) # prints `1`

browser = await pw.webkit.launch()
print(len(browser.contexts())) # prints `0`
context = await browser.new_context()
print(len(browser.contexts())) # prints `1`

Returns

List[BrowserContext]#

is_connected

Added in: v1.8

browser.is_connected

Indicates that the browser is connected.

Usage

browser.is_connected()

Returns

bool #

version

Added in: v1.8

browser.version

Returns the browser version.

Usage

browser.version

Returns

str #

Events

on("disconnected")

Added in: v1.8

browser.on("disconnected")

Emitted when Browser gets disconnected from the browser application. This might happen because of one of the following:

Browser application is closed or crashed.
The browser.close() method was called.

Usage

browser.on("disconnected", handler)

Event data

Browser

Methods​

close​

new_browser_cdp_session​

new_context​

new_page​

start_tracing​

stop_tracing​

Properties​

browser_type​

contexts​

is_connected​

version​

Events​

on("disconnected")​

Methods

close

new_browser_cdp_session

new_context

new_page

start_tracing

stop_tracing

Properties

browser_type

contexts

is_connected

version

Events

on("disconnected")