Google Chrome: How to delete cookie from a site / url

Symptom:
E.g.: 'unremember' Instagram account on Google Chrome

Solution:
Type the URL
Developer tools (​Ctrl+Shift+I).​
Application
Cookies
Right click on the URL: Clear.​

Source: quora.com

How to clear browser cache and history in Google Chrome, Firefox, Internet Explorer and Opera?

In Google Chrome, Firefox and Internet Explorer: Ctrl + Shift + Del

In Opera:
Opera tab (top left corner)
Settings (Alt + P)
Privacy & security
Clear browsing data

How to set proxy in Google Chrome on Linux?

Right click on the Chromium desktop icon and click on properties.
In the dialog box that opens, add this line after the %U in the command field:

--proxy-server=<host:port>

(Where "host" is your proxy server name or address, and "port" is your proxy server port.)

Slow Google Chrome and other apps if Windows 8 updates are not applied for a while

If Windows 8 updates are not applied for a while, Google Chrome and other apps will be slow.
Run Windows 8 Update (if it hangs somehow - manually) and the system will work on normal speed.