What commands can I put into Firefox in the address bar? [closed]

Question

I found out that if I put javascript:<javascript code> into the address bar in Firefox I can get some scripts to operate on the page. What commands can I use in this way and where are they documented?

For example, I have seen that you can put viewsource in there too but I can't get the correct syntax.

Answer 1

That's not actually a command, it's a URI scheme. Firefox understands a number of URI schemes and they have various uses:

• about: Special pages (see about:about for a partial list)
• chrome: Internal UI components, including localisable text and customisable appearance
• data: Used to simulate files. For instance, you could use data:text/plain,Hello! to simulate the effect of a file containing the string Hello!
• feed: Used to refer to Atom or RSS feeds
• file: Used to refer to local files (only works from other files obviously)
• ftp: Used to download from FTP sites
• http: Used to refer to websites (obviously)
• https: Used to refer to secure sites
• jar: Used to extract entries from within ZIP files (jar:!/path/to/entry)
• javascript: Used to execute Javascript (obsoleted by onclick handler) moz-icon: Used by the UI to refer to icons for files or file types
• resource: Other internal resources
• view-source: Used to show the source of a page (view-source:URI)

Answer 2

This is the basis the Bookmarklet. More:

http://www.bookmarklets.com/

http://www.squarefree.com/bookmarklets/

Answer 3

Those are two things you talk about.
One is a Javascript thingie, a javascript command, which you can use on every page that uses JS. There is NO list about these commands, they vary from page to page. If you manage to discover the right values/variables/commands, you can do nasty tricks on some pages. Like the trick with RapidShare in the good ol' days where you could reset the timer to 0 sec, so the Free DL became Premium in a blink.

The other one is the about:blank, about:config, etc. The browser in-built dialogs, settings, etc.

Answer 4

This question could right-on turn into a Stackoverflow question.

Okay, well.

First of all, the commands you can do after "javascript:" are practically everything you can do in javascript. Look up the language! You can alter the currently shown webpage with this, but as somebody else stated: What works with those depends on what page you are on!

Javascript is the (de-facto?) standard for scripting HTML documents.

Look up the language itself, first!