chromecacheview -folder "C:\Users\JohnDoe\AppData\Local\Google\Chrome\User Data\Default\Cache\" /copycache "" "image/png" /CopyFilesFolder "c:\users\johndoe\documents\temp\chrome" /UseWebSiteDirStructure 0

You can use the -folder option to tell ChromeCacheView which user's cache file you wish to use while the /copycache option can be used to specify the directory where you want images, such as PNG files, to be copied—in this case I was looking for a .png file because when I examined the HTML code on the webpage I thought that the the image was a PNG file. I created a temp\chrome directory under the Documents directory for the user account prior to issuing the command to hold the images stored in the cache. After the command completed, I could see all of the PNG files that had been in the Chrome cache in that temporary directory I had created.

When I didn't see the image I was looking for, I thought I might have misidentified it in the code, so I copied all of the image files from the cache directory, not just the PNG ones by changing "image/png" to "image" in the command. I.e.:

chromecacheview -folder "C:\Users\JohnDoe\AppData\Local\Google\Chrome\User Data\Default\Cache\" /copycache "" "image" /CopyFilesFolder "c:\users\johndoe\documents\temp\chrome" /UseWebSiteDirStructure 0

That copied AVIF (.avif), BMP GIF (.gif), icon (.ico), JPEG (.jpg), JPEG File Interchange Format (JFIF) (.jfif), SVG (.svg), and WebP (.webp) files from the cache as well as the PNG ones.

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To remove cookies for a specific site in Google Chrome version 62, take the following steps:

1. Put chrome://settings/siteData in the Chrome address bar where you normally place URLs which will show you a list of all the cookies stored on the system.
2. In the "Search cookies" field, type the relevant domain name, e.g., mattel.com; you will then see only the cookies for that particular domain.
3. Click on "REMOVE ALL SHOWN" to remove all of the cookies for the domain. You will then be warned "This will delete any data stored on your device for all the sites shown. Do you want to continue?" Click on the "CLEAR ALL" button to delete all of the cookies for the domain.

You can also go directly to the list of all the cookies associated with a particular domain by putting chrome://settings/cookies/detail?site= followed by the domain name in the address bar, e.g., chrome://settings/cookies/detail?site=mattel.com. You can then click on "REMOVE ALL" to delete all of the listed cookies for the domain.

Note: Tested with Google Chrome Version 62.0.3202.89 (Official Build) (32-bit) on a system running Microsoft Windows 7 Professional.

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$ top -o cpu

Processes: 318 total, 7 running, 11 stuck, 300 sleeping, 2181 threads  10:57:11
Load Avg: 3.82, 6.20, 6.94  CPU usage: 35.23% user, 5.81% sys, 58.95% idle
SharedLibs: 16M resident, 10M data, 0B linkedit.
MemRegions: 187449 total, 7337M resident, 52M private, 1115M shared.
PhysMem: 16G used (2532M wired), 19M unused.
VM: 703G vsize, 1063M framework vsize, 11083768(0) swapins, 16907853(0) swapouts
Networks: packets: 17956740/12G in, 13426851/3518M out.
Disks: 13779844/398G read, 14840307/588G written.

PID    COMMAND      %CPU TIME     #TH    #WQ  #PORT MEM    PURG   CMPRS  PGRP
29634- Google Chrom 89.2 23:16:01 13     0    85    817M+  0B     638M-  515
28991- Google Chrom 30.7 23:37:36 10/1   0    78    124M+  0B     344M-  515
0      kernel_task  20.6 32:32:35 104/10 0    2     1685M+ 0B     0B     0
30147- Google Chrom 14.7 18:55:10 10     0    78    47M+   0B     87M    515
609-   Google Chrom 12.9 13:55:01 4/1    0    93    153M+  0B     859M-  515
75040- Google Chrom 12.7 09:26:48 19     0    89    100M+  0B     523M-  515
46990- Google Chrom 12.4 16:15:41 10     0    78    53M+   0B     194M-  515
55854- Google Chrom 11.1 12:09:27 10     0    78    42M    0B     100M   515
79850- Google Chrom 11.0 02:49:58 10     0    78    44M    0B     91M    515
55744- Google Chrom 10.5 12:19:13 20     0    92    31M+   0B     148M-  515
79625- Google Chrom 10.2 06:55:52 11     0    82    95M+   0B     442M-  515
83785- Google Chrom 9.1  04:23:07 10/1   0    78    35M+   0B     135M-  515
84883- Google Chrom 9.1  04:30:16 10/1   0    78    36M-   0B     71M-   515
190    WindowServer 8.8  14:29:00 5      1    1590- 44M-   8952K  628M   190
60247- Google Chrom 8.0  05:43:24 11/1   0    81    91M+   0B     247M-  515

You can determine what web pages a Google Chrome process has open by putting chrome://memory in the Chrome address bar. Once you've identified the relevant Chrome window/tabs associated with a process, you can close the tab, or tabs, that may be associated with the process to reduce CPU usage. If needed, you can also suspend a process temporarily under OS X with the kill command.

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Since I had viewed the notes in the Google Chrome browser on the Microsoft Windows-based system I was on shortly before I overwrote them, I thought I might be able to find a copy of the notes in the browser's cache. But since I didn't grasp what I had done until I refreshed the page in the browser, it was now too late to get the data from the Chrome cache, since the cached page now just showed the "404 file not found" message due to the file no longer existing on the web server. So I thought there still might be a slim chance that I could recover the notes web page from a Volume Shadow Copy, i.e., a prior version of the file stored on the Windows system. I thought, if I could identify the particular cache file used for that webpage, there might be a prior version of that file stored by the Volume Shadow Copy Service. I thought I could possibly use ChromeCacheView, which is a small, free program that will allow you to examine the Google Chrome web browser cache. With that program you can view a list of all cached web pages and view the cached copies of those pages stored on the system. I was able to identify the particular file in the C:\Users\%username%\AppData\Local\Google\Chrome\User Data\Default\Cache directory that held that particular cached webpage. The file was data_4, but unfortunately, I wasn't able to find a prior version of the file. Though if you need to examine the Chrome cache on a Microsoft Windows system, ChromeCacheView is a very useful tool well-suited to that purpose. You can also put chrome://cache in the Chrome addres bar to see a list of URLs of cached pages, but ChromeCacheView provides many more capabilities for operations on that list of cached items.

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I could see that the Chrome tab consuming the most memory was one consuming 937.2 MB of memory.

To determine what webpages associated with tabs open in Chrome are consuming excessive amounts of memory or CPU time, put chrome://memory in the address bar of the browser. That will provide information on the amount of memory consumed by each tab open in the browser as can be seen in this example. Since the entries aren't ordered by memory utilization, you will need to scroll through the list to find the tabs consuming the most memory.

In this case, when I scrolled through the list I saw the tab that was consuming 937.2 MB of memory had a CNN.com article open in it. When I went to that tab I saw a "Shockwave Flash has crashed" message at the top of the tab. When I clicked on "Reload", I saw that memory utilization for that tab inreased slightly. Moving back to a prior page in the tab with the back arrow resulted in the Task Manager then showing the highest memory utilization for a Chrome process to be about half the 937.2 MB shown previously. I closed the tab to free memory.

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E.g., Google Chrome maintains its own internal DNS cache. You can display the entries in that cache by putting chrome://dns in the address bar for Chrome. When you do so, you will see information similar to that displayed below:

You will also see a page load count for web pages.

If you put chrome://downloads/ in the address bar you will see a list of the recently downloaded files and the URLs that were used to download them as well as the dates on which the files were downloaded..

You can view Chrome's history information showing a list of recently visited pages with the days and times they were visited with chrome://history/.

You can see information on Chrome's memory utilization, including the amount of memory used by each Chrome tab using chrome://memory. That will also reveal the amount of memory used by other browsers, such as Internet Explorer and Firefox, that are open on the system. E.g., this is an example from a Windows 7 system where 3 tabs are open within Chrome, one for Wikipedia, one for Google, i.e., google.com, and one for chrome://memory itself, which is labeled "About Memory". The tabs are identified by Tab at the beginning of the name. IE 11 and Firefox 35.0.1 are also open on the system and so information about their memory utitlization is also displayed.

References:

1. 12 Most Useful Google Chrome Browser chrome:// Command
   By Ramesh Natarajan
   Date: October 12, 2011
   The Geek Stuff

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1. Click on the menu bar, which is 3 horizontal bars one beneath the other at the top right of the Chrome window.
2. Select Settings.
3. Click on the Make Google the default browser.
4. On a Windows system, you may see a window asking "How do you want to open this type of link (http)?" which shows the other browsers on the system that can be used to access websites. Click on Google Chrome

   

When you do that, the HKEY_CLASSES_ROOT\http\shell\open\command is updated as shown below when the query was run before and after the default browser was changed from Internet Explorer to Google Chrome on a Windows Server 2012 Essentials system.

C:\>reg query HKEY_CLASSES_ROOT\http\shell\open\command /ve

HKEY_CLASSES_ROOT\http\shell\open\command
    (Default)    REG_SZ    "C:\Program Files\Internet Explorer\iexplore.exe" %1


C:\>reg query HKEY_CLASSES_ROOT\http\shell\open\command /ve

HKEY_CLASSES_ROOT\http\shell\open\command
    (Default)    REG_SZ    "C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" -- "%1"

If Firefox is the default browser, the value will be similar to the following, depending on where you installed Firefox:

"C:\Program Files\Mozilla Firefox\firefox.exe" -osint -url "%1"

References:

1. Determining the default browser from the command line
   Date: July 18, 2014
   MoonPoint Support

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