Browsers Cheat Sheet

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Mozilla Firefox

Configurations

• All configurations: about:config
• Cache content: about:cache

Browser History

Browser history is stored in a SQLite database.

locate places.sqlite
sqlite3 <path to places.sqlite>
select * from moz_places;
.quit

Edit JavaScript files

❗ The files cannot be edited directly in Firefox’ DevTools (unlike Chrome).

• Right-click on the page and click Inspect.
• Click on the Debugger tab within the Dev Tools.
• Locate the script that you want to edit (.js).
• Right-click on the script and select Add script override. Choose any folder.
• Open the script and edit with your favorite code editor.

Access variables from iframes in Console

• Right-click on the page and click Inspect.
• Select the Console tab.
• Click the dropdown to select the iframe window (defaults to Top). It is located at the bottom-right corner, beside the console textbox.

Google Chrome

Configurations

• All configurations: chrome://about/
• chrome://version/
• chrome://history/
• chrome://policy/
• chrome://system/

Edit JavaScript files

• Right-click on the page and click Inspect.
• Click on the Sources tab within the Dev Tools.
• Locate the script that you want to edit (.js).
• Right-click on the script and select Override content. Choose any folder.
• Open a new tab and go to “chrome://version//inspect/#device”.
• Click Allow to allow Chrome to access the folder.
• Edit the script within the DevTools.

Access variables from iframes in Console

See example (GitHub).

• Right-click on the page and click Inspect.
• Select the Console tab.
• Click the dropdown to select the iframe window (defaults to top). It is located at the top-left corner of the console.