Disable autocomplete in firefox

Autocomplete is usually design to help user faster in typing, but sometime it also bugging you if the word you typed is not what you want. If so, you will be able to disable these from the tools menu.

Mozilla Firefox saves information entered in web page forms and the Search Bar to make filling out forms and surfing faster.
follow these step to erase AutoComplete history in Firefox:

• Select "Tools"
• Select "Options".
• Open the "Privacy" tab.
• Click the "Clear" button in the "Saved Form Information" area.

To turn off Autocomplete in Firefox, remove the check mark from the "Save information I enter in web page forms and the Search Bar". Also see How disable AutoComplete forms in Firefox

You can also erase Firefox AutoComplete history using Clear All History "Clear browser history" feature for Mozilla.