To Remove Delta Toolbar
• Open the Mozilla Firefox browser
• Select the Add-ons menu
• Uninstall/ Remove the Delta extension
To Remove Delta Search Engine
• Open the Mozilla Firefox browser
• Go to the small magnifier at the top right of the browser (see figure), select Manage Search Engines
• Choose/select My Online Search, then click Remove, --> click OK to save the change
• Go to Options
• Click General Tab
• Change Startup address from Delta to another you want, click Save to save configuration
• Go to address bar and type : about:config click Go or Enter, then will appear the warning : This might void your warranty! , click I'll be careful, I promise!
• On the column filter/search, type delta, then press Enter
• will appear 2 preference names with value begin with https://www.my-online-search.com, right click on each value, then click Reset
Now Delta has already removed from your Mozilla Firefox browser.
