FirefoxMobile.co.uk

Are you getting the friendly HTTP error messages like “Internal Server Error” , but want to see more details of the error? This is very useful for debugging code, so here’s how to do it:

1. In the Firefox address bar, type “about:config” – this will bring up a special Firefox configuration screen. If you’re doing this the first time, you might get the message “This might void your warranty!”

2. Just click on the button “I’ll be careful, I promise!” and move on….

3. You’ll see a list of configuration codes – I suggest not to touch anything here, unless you have make it to Level 5 Firefox Configurator.

4. In the filter bar, type in “error” and press enter. The list now shortens to those that contains the word error.

5. You’ll see that by default, browser.xul.error_pages.enabled is set to “true”. Double click on that line and it will change to “false”.

6. Close and restart Firefox.

Now, by doing that you’ll get all the extended warning and error messages.

If you wish to enable this for Internet Explorer (if for some reason you are still not using the Firefox.. oh dear, how can you not be using Firefox?!):

1. Go to Tools > Internet Options.
2. Click or select the Advanced Tab.
3. Look for the “Browsing” section. Under that, look for the checkbox “Show friendly HTTP error messages”.
4. Untick that or make sure it’s not ticked.
5. Click OK and you can now view extended error messages from web servers.

Good luck with your debugging !

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