The new security panel for Chrome/Chromium from v48

Google announced the new security panel for Chrome from v48 in Chrome’s DevTools, this feature can help users easily know the security information for every network connection/request in a certain website, including the certificate info, now it’s been easier to debug what’s the reason why a website didn’t get a green lock on the url bar(A website using https with enough strengh will have a green lock icon).

Screenshots as example (using my blog):

www.peterdavehello.org_chrome_security_panel2

www.peterdavehello.org_chrome_security_panel

References:

Security Panel debuts in Chrome DevTools
https://developers.google.com/web/updates/2015/12/security-panel

Introducing the Security Panel in DevTools – Chromium Blog
https://blog.chromium.org/2016/01/introducing-security-panel-in-devtools.html

Mute certain tab in Google Chrome/Chromium

Open chrome://flags/#enable-tab-audio-muting and enable “Enable tab audio muting UI control” option, then restart your browser.
chrome-enable-tab-audio-muting

Now we can have mute option on each tab:
chrome-enable-tab-audio-muting-menu

After that, there will be a muted icon on the tab, and if you want to unmute it, there is also an unmute option in the menu of the tab.
chrome-enable-tab-audio-muting-muted

Very useful when surfing to some noisy websites!

BTW , the demo screenshots came from the trailer of Transcendence, a very very awesome movie!

Flush local dns cache on browser and system

Browser(application) level:

For Google Chrome/Chromium, open the link below:
chrome://net-internals/#dns
and click “Clear host cache

For Firefox, open the link below:
about:config
and click “I’ll be careful, I promise!“,
and find network.dnsCacheExpiration, set its value to 0 (create one if it didn’t exist).
Now the cache should be flushed, and set network.dnsCacheExpiration back to 3600, or you the cache will not work at all.

Operating system level:

Windows:
ipconfig /flushdns

Linux:
Depends on the dns service:
sudo /etc/init.d/dns-clean restart
sudo /etc/init.d/nscd restart
sudo /etc/init.d/dnsmasq restart
/etc/init.d/named restart

Mac OS X(after 10.5):
dscacheutil -flushcache

Build Chromium OS from source [notes]

Environment: Ubuntu server 14.04.2 LTS x86_64 with Xeon E3-1230 V2 and 8G ram

Reference: Chromium OS Quick Start Guide

Step by step:

Install the necessary packages:

Install depot_tools:

Add depot_tools to your PATH:

Tweak sudoers config:

Create directory for chromiumos:

Get the source code:

Create(and enter) a chroot(still in the directory for chromiumos):

Choose a board you want to build for, from ~/trunk/src/overlays, and export it to environment:

(I selected amd64 arch)
Setup board:

Setup password:

(if you want to config kernel, you can try to configure it now, via ~/trunk/src/third_party/kernel/v3.4/chromeos/scripts/kernelconfig, place v3.4 with your kernel version here)
Build packages:

Build image(we are almost there):

Copy image to a usb drive:

or copy to file:

or create a imgage for virtual machine
(default for kvm, for other vm you can pass parameters –format=vmware or –format=virtualbox):

(image will be here : ~/trunk/src/build/images/${BOARD}/latest/)

If you copy image to a file, you can use dd to write to a usb disk like this:

And then you can boot a computer via this usb disk now.

If you got kernel panic, you may need to press Esc and try this command to boot

, X may be a~e

If you want to install Chromium OS to your hard disk, try this command when your usb disk boot up:

, PS, it’ll wipe your disk!!!

Don’t know what’s the reason why it’ll keep getting deadly segment fault and hang, but it works on my acer Aspire one D150, a super old notebook, the performance is not so good, and I don’t know how to remap the keyboard on it(there are 3 broken keys orz …), so I just quit, ha!

Only 2 screenshots this time … took by my low-end phone.
ChromiumOS

ChromiumOS2

Google終於出手了, Chrome被綁架的救星? Software removal tool (beta)

Google終於看不下去瀏覽器被綁架的亂象了? 最近推出了 Software removal tool (beta),貌似是用來移除Chrome上面各種有害軟體的工具,既然是Google親自出馬,想必很有看頭?

之前筆記了一篇 “電腦好人必備之清除瀏覽器綁架及廣告軟體“,沒想到前陣子遇到一台被綁架到用了Junkware Removal Tool + AdwCleaner + avast! Browser Cleanup 都還是對付不了的怪物,看來要拿Google的工具出馬了,也許真的是Chrome被綁架的救星啊 …