Httqm's Docs

Chromium : Enter password to unlock your keyring

Every time I open Chromium, I get a pop-up asking :

Enter password to unlock your keyring

Let's make this clear, Chromium :

Stop harassing me with this f*cking prompt every time !!!

The idea is to let Chromium use a basic (i.e. unencrypted) password store. This is done by passing it the --password-store=basic startup option.
The way you'll specify such options depends on how you're actually starting the application : from the "Start menu", a desktop launcher, ...
Editing "Start menu" options depends on your desktop environment; here's the information for XFCE.

This is a quick'n'dirty version of the XFCE procedure linked above. Understand what you type, use at your own risks.

As root :

edit /usr/share/applications/chromium.desktop
change
Exec=/usr/bin/chromium %U
into
Exec=/usr/bin/chromium %U --password-store=basic

as root :

sed -i 's|Exec=/usr/bin/chromium %U|Exec=/usr/bin/chromium %U --password-store=basic|' /usr/share/applications/chromium.desktop