Mozilla Connect

I'm new to Instagram. I grudgingly accept that the app is designed for smart phone and smart pad so I'm trying to limit what I do on my PC with the app. Recently I can no longer edit any posts on my PC although everything works well on other browsers...

I have a 27" monitor and am having issues reading the fonts in the taskbar and the area above. I would be very grateful if there were a mechanism to easily change both icon and font sizes. I think this issue has been raised before but somehow hasn't ...