[bug] "firefox" browser was not found.

[mrthevinh]

playwright playwright==1.8.0a1
playwright install
Run my script with firefox erro.. webkit and chrome still work

"firefox" browser was not found.
Please complete Playwright installation via running

    "python -m playwright install"

[pavelfeldman]

That's unusual, we have bots testing it. Could you share more on your OS and Python version? I assume first line of your bug should have been

pip install playwright==1.8.0a1

[mrthevinh]

My OS is window 10 python 3.9. I try it on python 3.7 and 3.8 too but firefox still dont work!

    browser = browser_type.launch()
  File "C:\Users\The Vinh\AppData\Local\Programs\Python\Python39\lib\site-packages\playwright\sync_api.py", line 6974, in launch
    self._sync(
  File "C:\Users\The Vinh\AppData\Local\Programs\Python\Python39\lib\site-packages\playwright\_sync_base.py", line 97, in _sync
    return future.result()
  File "C:\Users\The Vinh\AppData\Local\Programs\Python\Python39\lib\site-packages\playwright\_browser_type.py", line 77, in launch
    raise not_installed_error(f'"{self.name}" browser was not found.')
Exception: 

Could you tell me how to debug it to get more report

[mxschmitt]

Could you try to add a print(e) of the original exception in C:\Users\The Vinh\AppData\Local\Programs\Python\Python39\lib\site-packages\playwright\_browser_type.py line 75 and provide us the output of that?
That should give us more information.

[mrthevinh]

@mxschmitt thank your reply..
My code:

from playwright.sync_api import sync_playwright
with sync_playwright() as p:
    for browser_type in [p.firefox]:
        browser = browser_type.launch()
        page = browser.newPage()
        page.goto('http://whatsmyuseragent.org/')
        page.screenshot(path=f'example-{browser_type.name}.png')
        browser.close()

My error log show when I add print(e):

ERROR: The process "39608" not found.
Traceback (most recent call last):
  File "C:\Users\The Vinh\AppData\Local\Programs\Python\Python39\lib\site-packages\playwright\_impl\_browser_type.py", line 70, in launch
    return from_channel(await self._channel.send("launch", params))
  File "C:\Users\The Vinh\AppData\Local\Programs\Python\Python39\lib\site-packages\playwright\_impl\_connection.py", line 36, in send
    return await self.inner_send(method, params, False)
  File "C:\Users\The Vinh\AppData\Local\Programs\Python\Python39\lib\site-packages\playwright\_impl\_connection.py", line 47, in inner_send
    result = await callback.future
playwright._impl._api_types.Error: Protocol error (Browser.enable): Browser closed.
==================== Browser output: ====================
<launching> C:\Users\The Vinh\AppData\Local\ms-playwright\firefox-1225\firefox\firefox.exe -no-remote -headless -profile C:\Users\THEVIN~1\AppData\Local\Temp\playwright_firefoxdev_profile-qVvGyZ -juggler-pipe -silent
<launched> pid=39608
[err] *** You are running in headless mode.
[out] 
[out] Juggler listening to the pipe
[out] console.warn: SearchSettings: "get: No settings file exists, new profile?" (new Error("", "(unknown module)"))
[err] JavaScript error: resource://gre/modules/XULStore.jsm, line 66: Error: Can't find profile directory.
[err] 
[err] ###!!! [Child][MessageChannel] Error: (msgtype=0x3A0147,name=PContent::Msg_AsyncMessage) Channel closing: too late to send/recv, messages will be lost
[err] 
[err] JavaScript error: resource://activity-stream/lib/ASRouterNewTabHook.jsm, line 61: TypeError: this._router is null
[out] console.error: Region.jsm: "Error fetching region" (new TypeError("NetworkError when attempting to fetch resource.", "chrome://juggler/content/NetworkObserver.js", 421))
[out] console.error: Region.jsm: "Failed to fetch region" (new Error("NO_RESULT", "resource://gre/modules/Region.jsm", 422))
[err] 
[err] ###!!! [Child][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[err] 
=========================== logs ===========================
<launching> C:\Users\The Vinh\AppData\Local\ms-playwright\firefox-1225\firefox\firefox.exe -no-remote -headless -profile C:\Users\THEVIN~1\AppData\Local\Temp\playwright_firefoxdev_profile-qVvGyZ -juggler-pipe -silent
<launched> pid=39608
[err] *** You are running in headless mode.
[out] 
[out] Juggler listening to the pipe
[out] console.warn: SearchSettings: "get: No settings file exists, new profile?" (new Error("", "(unknown module)"))
[err] JavaScript error: resource://gre/modules/XULStore.jsm, line 66: Error: Can't find profile directory.
[err] 
[err] ###!!! [Child][MessageChannel] Error: (msgtype=0x3A0147,name=PContent::Msg_AsyncMessage) Channel closing: too late to send/recv, messages will be lost
[err] 
[err] JavaScript error: resource://activity-stream/lib/ASRouterNewTabHook.jsm, line 61: TypeError: this._router is null
[out] console.error: Region.jsm: "Error fetching region" (new TypeError("NetworkError when attempting to fetch resource.", "chrome://juggler/content/NetworkObserver.js", 421))
[out] console.error: Region.jsm: "Failed to fetch region" (new Error("NO_RESULT", "resource://gre/modules/Region.jsm", 422))
[err] 
[err] ###!!! [Child][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[err] 
============================================================
Note: use DEBUG=pw:api environment variable and rerun to capture Playwright logs.

During handling of the above exception, another exception occurred:

[mxschmitt]

Thanks thats helpful!

@aslushnikov maybe Firefox is confused because there is a ~ in the user name?

And in Python should be ensured, that such errors get displayed.

[mrthevinh]

Thanks @mxschmitt !
I add executable_path and firefox work great!

[astr0-g]

Thanks @mxschmitt !
I add executable_path and firefox work great!

Hi, I had the same problem 2 days ago, happy to see your posts, after using the print(e), I have the C:\Users\ADMINI~1\AppData\ as you have above, could you help me how to add excutable_path, please?

[mrthevinh]

@wg326

# copy your playwright filefox folder to C hdd
 path_ff = r'C:\firefox\firefox.exe'
 browser = browser_type.launch(executable_path=path_ff)

[astr0-g]

@wg326

# copy your playwright filefox folder to C hdd
 path_ff = r'C:\firefox\firefox.exe'
 browser = browser_type.launch(executable_path=path_ff)

@Martyheavey
Thank you so much!

[kumaraditya303]

Playwright has a new stable release so upgrade to it and try.

$ pip install playwright -U 

[pavelfeldman]

I believe this is fixed now