How to change arabic font?

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1

hey i want to change my Arabic font i tried to make a conf file in /etc/fonts/conf.d/ that contains this

<?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<fontconfig>
    <match target="pattern">
        <test name="lang" compare="contains">
            <string>ar</string>
        </test>
        <test qual="any" name="family">
            <string>sans-serif</string>
        </test>
        <edit name="family" mode="prepend" binding="strong">
            <string>Droid Arabic Kufi</string>
        </edit>
    </match>

    <match target="pattern">
        <test name="lang" compare="contains">
            <string>ar</string>
        </test>
        <test qual="any" name="family">
            <string>serif</string>
        </test>
        <edit name="family" mode="prepend" binding="strong">
            <string>Droid Arabic Kufi</string>
        </edit>
    </match>
</fontconfig>

in system like file manager and such, i can see the font but in apps like google chrome etc I cant any help?