[OpenaiChat] nodriver stopped working and 'g4f.errors.NoValidHarFileError: No .har file found or "No proof_token found in .har files"'

[iG8R]

Before submitting
☑️ I checked Known Issues
☑️ I searched existing issues

Configuration
(Required)

• Model: gpt-4o-mini
• Provider: OpenaiChat
• Interface: API

Bug description
Clear steps to reproduce:

1. Run
   .\venv\Scripts\activate
g4f api --debug
2. Try using OpenaiChat via http://127.0.0.1:1337/v1/chat/completions?provider=OpenaiChat
3. Get the following

Environment location
Local

Observed behavior vs expected
Almost 8 hours ago it worked just fine, if there was no har-file or auth_OpenaiChat.json in the har_and_cookies dir, then nodriver started working. For now, any nodriver window doesn't appear and immediately the error occurs.

Environment

• Python version: 3.14.3
• OS: Microsoft Windows [Version 10.0.19045.2673]
• Relevant dependencies: pip freeze | grep -E 'g4f|requests'

Additional context
Proxy/VPN usage? - No
Special config? - No
Other providers working? - Yes. E.g. Gemini, as it can be seen in the screenshots.

[iG8R]

Ooops...
Gemini also stopped working:

---

But version 0.6.9.5 works fine:

[iG8R]

@hlohaus
Could you please check this?

[iG8R]

@hlohaus
I found out the cause of this issue - in new releases, starting from version 7.0.0, a change occurred where nodriver in scripts was replaced by zendriver; however, zendriver was not included in the installed modules. At the same time, I do not know why, but errors related to the absence of zendriver do not arise.

[hlohaus]

@iG8R oh, i was woundering about your issues. I changed from nodriver to zendriver. Both provider doesn't need browser, thats why they have no zendriver missing requirments error.

[iG8R]

But after I installed zendriver (pip install zendriver) this issue has gone.
And, as I see in OpenaiChat.py and Gemini.py there are the following lines in it:

try:
    import zendriver as nodriver

    has_nodriver = True
except ImportError:
    has_nodriver = False

Moreover, if both providers don't need browser, why did every now and then nodriver appear and grab cookies?

[hlohaus]

because they found no cookies in the cookies dir and installed browsers.

[iG8R]

But in the previous version 0.6.9.5, where nodriver was used, or with zendriver installed in version 7.x.x, if there are no cookies in the cookies directory, g4f automatically retrieves them, otherwise, the aforementioned issue occurs without any hints as to the reasons for its occurrence.
Additionally, what do you mean by "installed browsers"? I have Firefox, Edge, and Chrome with active logins to my Gemini and ChatGPT accounts, but g4f still requires running nodriver or zendriver to function without errors.
To be honest, if I logged into Gemini in Firefox, g4f could sometimes intercept cookies from it, but OpenGPT cookies — never at all.
What logs should I provide to help you understand why this is happening?

[hlohaus]

ChatGPT needs more than cookies. I mean Gemini. @iG8R

[iG8R]

Thank you, I got it.
As for now I have the following statistics for Gemini - out of 18 g4f launches without cookies in the har_and_cookies dir, cookies were successfully retrieved from Firefox in 15 cases, while in 3 cases, the Firefox cookies were reset, and I had to log in again. I think this happened because of g4f, since usually my active login lasts at least 7–10 days, and I performed these 18 g4f runs over approximately 3 hours.
What else does ChatGPT need than cookies to behave the same way as Gemini to retrieve cookies from Forefox and not totally depend on zendriver?