Duplicate Check
Describe the bug
Using the example https://docs.flet.dev/webview/
running: uv run flet run --web .\main.py
server: http://127.0.0.1:63348
Firefox 148.0.2 (64-bit) response:
"""
Be careful. Something doesn’t look right.
Firefox didn’t load this page because it looks like the security configuration doesn’t match the previous page.
Sometimes websites set up protections for themselves and people like you from unwanted interactions with other sites.
Learn more about Cross Origin Embedder Policies (COEP)
"""
Injecting <script> tag. Using callback. entrypoint_loader.js:126:17
unreachable code after return statement main.dart.js:211575:1
unreachable code after return statement main.dart.js:229177:1
WEBGL_debug_renderer_info is deprecated in Firefox and will be removed. Please use RENDERER. canvaskit.js:15:383
Flutter app loaded 127.0.0.1:63348:44:15
WEBGL_debug_renderer_info is deprecated in Firefox and will be removed. Please use RENDERER. 2 canvaskit.js:15:383
WebGL warning: getParameter: The READ_BUFFER attachment is multisampled. 2
Chrome 146.0.7680.80 (Official Build) (64-bit) response:
"""
flet.dev refused to connect.
"""
Flutter app loaded
(index):1 Unsafe attempt to load URL https://flet.dev/ from frame with URL chrome-error://chromewebdata/. Domains, protocols and ports must match.
Understand this error
Code sample
Code
import flet_webview as fwv
import flet as ft
def main(page: ft.Page):
page.add(
fwv.WebView(
url="https://flet.dev",
on_page_started=lambda _: print("Page started"),
on_page_ended=lambda _: print("Page ended"),
on_web_resource_error=lambda e: print("WebView error:", e.data),
expand=True,
)
)
ft.run(main)
To reproduce
uv run flet run --web .\main.py
Expected behavior
return and show https://flet.dev
Screenshots / Videos
Captures
[Upload media here]
Operating System
Windows
Operating system details
10
Flet version
0.82.2
Regression
No, it isn't
Suggestions
No response
Logs
Logs
Additional details
No response
Duplicate Check
Describe the bug
Using the example https://docs.flet.dev/webview/
running: uv run flet run --web .\main.py
server: http://127.0.0.1:63348
Firefox 148.0.2 (64-bit) response:
"""
Be careful. Something doesn’t look right.
Firefox didn’t load this page because it looks like the security configuration doesn’t match the previous page.
Sometimes websites set up protections for themselves and people like you from unwanted interactions with other sites.
Learn more about Cross Origin Embedder Policies (COEP)
"""
Injecting <script> tag. Using callback. entrypoint_loader.js:126:17
unreachable code after return statement main.dart.js:211575:1
unreachable code after return statement main.dart.js:229177:1
WEBGL_debug_renderer_info is deprecated in Firefox and will be removed. Please use RENDERER. canvaskit.js:15:383
Flutter app loaded 127.0.0.1:63348:44:15
WEBGL_debug_renderer_info is deprecated in Firefox and will be removed. Please use RENDERER. 2 canvaskit.js:15:383
WebGL warning: getParameter: The READ_BUFFER attachment is multisampled. 2
Chrome 146.0.7680.80 (Official Build) (64-bit) response:
"""
flet.dev refused to connect.
"""
Flutter app loaded
(index):1 Unsafe attempt to load URL https://flet.dev/ from frame with URL chrome-error://chromewebdata/. Domains, protocols and ports must match.
Understand this error
Code sample
Code
To reproduce
uv run flet run --web .\main.py
Expected behavior
return and show https://flet.dev
Screenshots / Videos
Captures
[Upload media here]
Operating System
Windows
Operating system details
10
Flet version
0.82.2
Regression
No, it isn't
Suggestions
No response
Logs
Logs
[Paste your logs here]Additional details
No response