What font is used in cases where you get a bold font?

You can right-click and select "Inspect Element" to open the built-in Inspector with this element selected. You can check the font used for selected text in the Font tab in the right pane of the Inspector. Set devtools.fontinspector.enabled to true on the about:config page to enabled the Font tab.

It is possible that there is a problem with the font that is used to display the text.

You can do a font test to see if you can identify corrupted font(s).

• http://browserspy.dk/fonts-flash.php?detail=1

You can try different default fonts and temporarily disable website fonts to test the selected default font.

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

Thanks for the instantanious reply. I've downloaded lastest flash and it's ok. I still go on one of my email providers and it shows bold and on some sites still yet, bold. Weird!

p.s. Sorry i 4got to say that the enabled on the above-options, prefs. etc...is 'enabled' already.