Preventing Bad Grease Monkeys from changing your prices in eCommerce sites
I spoke with Gina Trapani on Wednesday about my concerns on this issue. The problem is that many online shops are using hidden fields in forms to pass information such as pricing, shipping, and quantity to their online checkout systems. Now I love Google Checkout for its sheer simple integration methods, but there is also an option to auto approve the payment and this concerns me. So I am writing to you today to illustrate some of the methods I have came up with which will hopefully prevent this sort of attack. Here are three ways you can circumvent this little flaw in many online stores.
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How to create Firefox extensions

I recommend a lot of FireFox extensions here on Tim Matheson, but what if you could make your own FireFox extension and never download one again? Roachfiend.com has a great article titled “How to create Firefox extensions” and thats just what it teaches you. Imagine that.
Link Via Roachfiend.com
Ask Tim:Synchronize my Firefox bookmarks to another computer
Foxmarks is a Firefox extension that allows you to synchronize your Firefox bookmarks to another computer. If you are able to run Firefox at work and want an easy way to keep your bookmarks in order then this is for you. Foxmarks requires you have an account to use it. The account is free and allows you to use it virtually anywhere you have Firefox and Foxmarks running.
The Foxmarks Bookmark Synchronizer automatically synchronizes your bookmarks between two or more computers running Firefox. It also lets you access your bookmarks from any computer anytime via my.foxmarks.com.
Forecastfox Enhanced

Forecastfox Enhanced is an excellent addition to the Firefox browser. This little extension will display your local weather forecast continuously in your browser’s status bar.