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![How to add horizontal and vertical rulers in Firefox [Tip] | dotTech](https://dt.azadicdn.com/wp-content/uploads/2015/04/Foxguide3-620x384.png?7653 "How to add horizontal and vertical rulers in Firefox [Tip] | dotTech")
How to add horizontal and vertical rulers in Firefox [Tip] | dotTech
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![How to add horizontal and vertical rulers in Firefox [Tip] | dotTech](https://dottech.org/wp-content/uploads/2015/04/foxguide.png "How to add horizontal and vertical rulers in Firefox [Tip] | dotTech")
How to add horizontal and vertical rulers in Firefox [Tip] | dotTech
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![How to add horizontal and vertical rulers in Firefox [Tip] | dotTech](https://dt.azadicdn.com/wp-content/uploads/2015/04/Foxguide2.png?7653 "How to add horizontal and vertical rulers in Firefox [Tip] | dotTech")
How to add horizontal and vertical rulers in Firefox [Tip] | dotTech
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