Some extensions that you can look at:

• Image Block: https://addons.mozilla.org/firefox/addon/image-block/
• ImgLikeOpera: https://addons.mozilla.org/firefox/addon/imglikeopera/

• Tab Permissions: https://addons.mozilla.org/firefox/addon/tab-permissions/
• QuickImage: https://addons.mozilla.org/firefox/addon/8126

Quick Java allows quick enable and disable of Java, Javascript, Cookies, Image Animations, Flash, Silverlight, Images, Stylesheets and Proxy from the Statusbar and/or Toolbar.

https://addons.mozilla.org/en-US/firefox/addon/quickjava/

Add-ons are not an option. I work in an office environment so I can't use add-ons.

Update: I tried the first link to see if the GPO allows download and luckily the plugin wasn't detected as a download and it works well since the button is on the interface and can be toggled quickly instead of having to switch back and forth between the menu.

If adding add-on isn't an issue, I highly suggest this TC.

If you can't use add-ons then you need to toggle prefs on the about:config page.

• http://kb.mozillazine.org/permissions.default.image (1: allow; 2: block)
• http://kb.mozillazine.org/javascript.enabled (true/false)

You can also do this by evaluating JavaScript code in the Browser/Error Console (Firefox/Tools > Web Developer;Ctrl+Shift+J). If you leave the Error Console open then you do not have to copy the code another time during the session, but you can click the Evaluate button to toggle the pref.

Copy and Paste the JavaScript code in the Code field in the Browser/Error Console (Firefox/Tools > Web Developer;Ctrl+Shift+J) and click the Evaluate button.

Load Images:

var {classes:Cc,interfaces:Ci} = Components;
var PS = Cc["@mozilla.org/embedcomp/prompt-service;1"] .getService(Ci.nsIPromptService);
var PB = Cc["@mozilla.org/preferences-service;1"].getService(Ci.nsIPrefService).getBranch("");
var PN = "permissions.default.image", PV = PB.getIntPref(PN);

PV = (PV==2)?"yes":"no";
var res = PS.confirm(null, "Load Images", PN + ": " + PV);
if (res) { PV = (PV=="yes")?1:2; PB.setIntPref(PN, PV); }

JavaScript:

var {classes:Cc,interfaces:Ci} = Components;
var PS = Cc["@mozilla.org/embedcomp/prompt-service;1"] .getService(Ci.nsIPromptService);
var PB = Cc["@mozilla.org/preferences-service;1"].getService(Ci.nsIPrefService).getBranch("");
var PN = "javascript.enabled", PV = PB.getBoolPref(PN);

PV = (PV==false)?"yes":"no";
var res = PS.confirm(null, "Enable JavaScript", PN+ ": "+ PV);
if (res) { PV = (PV=="yes")?true:false; PB.setBoolPref(PN, PV); }

This code will allow to enable and disable Images and JavaScript in the current tab only, provided that it is globally enabled.

Images (tab):

var {classes:Cc,interfaces:Ci} = Components;
var PS = Cc["@mozilla.org/embedcomp/prompt-service;1"].getService(Ci.nsIPromptService);
var wm = Cc["@mozilla.org/appshell/window-mediator;1"].getService(Ci.nsIWindowMediator);
var gB = wm.getMostRecentWindow("navigator:browser").gBrowser;

function getDocShell() {
  var docShell = gB.docShell; docShell.QueryInterface(Ci.nsIDocShell);
  return docShell;
}

var PV = getDocShell().allowImages;
PV = (PV==false)?"yes":"no";
var res = PS.confirm(null, "Enable Images", "Images (tab): "+ PV);
if (res) { PV = (PV=="yes")?true:false; getDocShell().allowImages = PV; }

JavaScript (tab):

var {classes:Cc,interfaces:Ci} = Components;
var PS = Cc["@mozilla.org/embedcomp/prompt-service;1"].getService(Ci.nsIPromptService);
var wm = Cc["@mozilla.org/appshell/window-mediator;1"].getService(Ci.nsIWindowMediator);
var gB = wm.getMostRecentWindow("navigator:browser").gBrowser;

function getDocShell() {
  var docShell = gB.docShell; docShell.QueryInterface(Ci.nsIDocShell);
  return docShell;
}

var PV = getDocShell().allowJavascript;
PV = (PV==false)?"yes":"no";
var res = PS.confirm(null, "Enable JavaScript", "JavaScript (tab): "+ PV);
if (res) { PV = (PV=="yes")?true:false; getDocShell().allowJavascript = PV; }

I was able to successfully install the image blocker extension, but why was I required to download and install an extension for this functionality? Saying that I can set image load preferences on a per page basis is silly and annoying. That does not compare to simply being able to click them on and off as I browse at work. I want to easily beable to turn it on and off.

As I said, I am using the extension, but the people who made the decision to remove the checkbox are idiots.

You can still set/inspect the image permissions for the domain in the current tab via Tools > Page Info > Permissions, but unfortunately not via the about:permissions page for all domains.

Which to me is a huge difference.

Thanks alot. Although setting permissions.default.image via about:config or Javascript is less convenient than just clicking a check box - it actually solved my problem. btw. your image download yes/no toggling javascript code works very well - which makes me wonder why a feature like that had to be removed from the menus...