How big are the add-ons that you use in the Firefox web browser? You do not get the answer to that question in the web browser. The add-on manager displays all kinds of information, but size is not one of them. But size could be important, especially if a user suspects that add-ons are the cause for slow downs in the browser.
You could open the Firefox profile folder, locate each add-on and check the disk space individually. This may take some time, especially if lots of add-ons are installed and used in the browser.
An alternative was recently posted in the Mozillazine forums. This can be used to display add-on sizes directly in the Firefox web browser.
The user Bluefang has posted code for Firefox 3.6 and Firefox 4. Here is how you display the add-on sizes in the browser:
- Copy the code from the Mozillazine forum. We have taken the liberty to attach the code to this post as well.
- Open the Error Console in Firefox. You can do that by pressing Ctrl-Shift-J, or clicking on Tools > Error Console in the menubar.
- Paste the code for your browser version into the Code row in the error console and click the Evaluate button afterwards.
- A new window opens that displays all installed extensions, plugins and userscripts. Sizes are only displayed for extensions. The size is shown in Bytes.
Firefox 4 code
const CI = Components.interfaces;
const CC = Components.classes;
function computeSizeRecursive(file)
{
file.QueryInterface(CI.nsIFile);
if(file.isSymlink())
{
return 0;
}
var size = file.fileSize;
if(file.isDirectory())
{
var files = file.directoryEntries;
while(files.hasMoreElements())
{
size += computeSizeRecursive(files.getNext());
}
}
return size;
}
Components.utils.import("resource://gre/modules/AddonManager.jsm");
AddonManager.getAllAddons(function(addons)
{
var addonData = "data:text/html,"
+ "<!DOCTYPE html>"
+ "<html lang=\"en\">"
+ " <head>"
+ " <title>"
+ " Additional Addon Information"
+ " </title>"
+ " </head>"
+ " <body>"
+ " <table>"
+ " <tr>"
+ " <td>"
+ " ID"
+ " </td>"
+ " <td>"
+ " Name"
+ " </td>"
+ " <td>"
+ " Size"
+ " </td>"
+ " </tr>";
addons.forEach(function(addon)
{
addonData += ""
+ "<tr>"
+ " <td>"
+ " " + addon.id
+ " </td>"
+ " <td>"
+ " " + addon.name
+ " </td>"
+ " <td>"
+ " " + ((addon.getResourceURI)
? computeSizeRecursive(addon.getResourceURI()
.QueryInterface(CI.nsIFileURL).file)
: "Unknown")
+ " </td>"
+ "</tr>";
});
addonData += ""
+ " </table>"
+ " </body>"
+ "</html>";
var windowManager = CC['@mozilla.org/appshell/window-mediator;1']
.getService(CI.nsIWindowMediator);
var win = windowManager.getMostRecentWindow("navigator:browser");
win.open(addonData, "", "");
});
Firefox 3.6 Code
const CI = Components.interfaces;
const CC = Components.classes;
function computeSizeRecursive(file)
{
file.QueryInterface(CI.nsIFile);
if(file.isSymlink())
{
return 0;
}
var size = file.fileSize;
if(file.isDirectory())
{
var files = file.directoryEntries;
while(files.hasMoreElements())
{
size += computeSizeRecursive(files.getNext());
}
}
return size;
}
var Application = CC["@mozilla.org/fuel/application;1"].getService(CI.fuelIApplication);
var addons = Application.extensions.all;
var extDir = Components.classes["@mozilla.org/file/directory_service;1"]
.getService(Components.interfaces.nsIProperties)
.get("ProfD", Components.interfaces.nsIFile);
extDir.append("extensions");
var ios = Components.classes["@mozilla.org/network/io-service;1"]
.getService(Components.interfaces.nsIIOService);
var addonData = "data:text/html,"
+ "<!DOCTYPE html>"
+ "<html lang=\"en\">"
+ " <head>"
+ " <title>"
+ " Additional Addon Information"
+ " </title>"
+ " </head>"
+ " <body>"
+ " <table>"
+ " <tr>"
+ " <td>"
+ " ID"
+ " </td>"
+ " <td>"
+ " Name"
+ " </td>"
+ " <td>"
+ " Size"
+ " </td>"
+ " </tr>";
addons.forEach(function(addon)
{
var ext = extDir.clone();
ext.append(addon.id);
addonData += ""
+ "<tr>"
+ " <td>"
+ " " + addon.id
+ " </td>"
+ " <td>"
+ " " + addon.name
+ " </td>"
+ " <td>"
+ " " + ((ext.exists())
? computeSizeRecursive(ext)
: "Unknown")
+ " </td>"
+ "</tr>";
});
addonData += ""
+ " </table>"
+ " </body>"
+ "</html>";
var windowManager = CC['@mozilla.org/appshell/window-mediator;1']
.getService(CI.nsIWindowMediator);
var win = windowManager.getMostRecentWindow("navigator:browser");
win.open(addonData, "", "");
It would be great if someone could create an add-on out of this, to display the add-on sizes in Firefox more comfortably. (thanks Jojo for the tip)
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It is sad that you need a new add-on to see the size of the add-ons.
Ops, my fault, did not read it properly.
In Firefox 3.6 there is much simpler way to find size of your extensions.
Install Extension Manager Extended. Now in Firefox extension manager right-click on any add-on and click on “Open Containing Folder”. It will open location where extension files are stored. Get size of the folder and you will know size of extension. It takes 10-20 seconds.
bf: I dont know why you find that simpler, first it involves installing an addon, second, is doing it manually for each faster or simpler than getting all the info at once ?
Anyway, does anyone know if disabled addons also get loaded into memory, and if FF checks for updates for disabled addons too ?