Check and make sure that language pack is on your computer.

Type about:preferences#content<enter> in the address bar. Across from fonts and colors, press the Advanced button. On the bottom, turn on Allow Web Sites To Choose Their Own.

It is possible that Firefox is using a font that doesn't cover this Unicode range.

You can right-click on a web page and select "Inspect Element" to open the Inspector (Firefox/Tools > Web Developer). You can check the font used for selected text in the Font tab in the right pane of the Inspector.

You may have to select another default font if there is a problem with the currently used font.

• http://en.wikipedia.org/wiki/Burmese_alphabet (0x1000-0x109F)

style="font-family:Myanmar3, Myanmar2, Myanmar1, Padauk, mm3web, TharLon, 'Masterpiece Uni Sans', Parabaik, Yunghkio, Thanlwin, 'Win Uni Innwa', 'MyMyanmar Unicode', 'Myanmar Text', 'WinUni Innwa', 'Noto Sans Myanmar';"

See also:

• http://en.wikibooks.org/wiki/Unicode/Character_reference/1000-1FFF
• http://www.alanwood.net/unicode/myanmar.html

Thanks, but no good. It was already selected  :(

I appreciate the help, though!

You can try different default fonts and temporarily disable website fonts to test the selected default font and see if you can find a font that works.

• Tools > Options > Content : Fonts & Colors > Advanced
• [ ] "Allow pages to choose their own fonts, instead of my selections above"