How can I find my browser web log file?

Project Chromium answers your question very well. However I will condense the information to only what you want.

Browser Web logs : Where they reside ?

Debug logs are stored in the user data directory as chrome_debug.log and this file is overwritten every time Chrome restarts. However you can stop the file from being overwritten by moving it to the desktop. So, Default User Data Directory for various platforms are :

1. On Windows

The default location is in the local app data folder :

[Chrome] %LOCALAPPDATA%\Google\Chrome\User Data
[Chromium] %LOCALAPPDATA%\Chromium\User Data

2. On MacOSX

In the Application Support folder :

[Chrome] ~/Library/Application Support/Google/Chrome
[Chromium] ~/Library/Application Support/Chromium

3. On Linux

In the ~/.config folder :

[Chrome Stable] ~/.config/google-chrome
[Chrome Beta] ~/.config/google-chrome-beta
[Chrome Dev] ~/.config/google-chrome-unstable
[Chromium] ~/.config/chromium

For More Platforms, Visit this.

---

For your Project, If you need you can Override the User Data Directory by typing this at command line

[Windows] chrome.exe --user-data-dir=c:\foo
[Linux]   google-chrome --user-data-dir=/path/to/foo
[Windows] chromium-browser --user-data-dir=c:\foo
[Linux]   chromium-browser --user-data-dir=/path/to/foo

Browser Web logs : How to enable and get data from it ?

By default, browser debug logs aren’t generated, so you’ll need to enable logging using command-line flags.

--enable-logging --v=1

Before using chrome_debug.log in a project, be aware that it can contain some personal information, such as URLs opened during that session of chrome.

Since the debug log is a human-readable text file, you can open it up with a text editor (notepad, vim, etc..) and use it just like the test file.

Also, the boilerplate values enclosed by brackets on each line are in the format :

[ process_id : thread_id : ticks_in_microseconds : log_level : file_name(line_number) ]

That would help in some way or other in your project.