I have the default theme on Firefox 66.0.2 for Linux Mint. I have noticed that most pages don't show up as they should or as, for example, they show in Chromium.
Is this something widespread, and how can I fix it?
This site:
Quora:
DuckDuckGo:
In the first screenshot, technically Firefox is doing nothing wrong. It's rendering textboxes and textareas like they would be rendered natively in the OS (it delegates to the OS look-and-feel when the element has not been excessively styled with CSS). If the website owner wanted to ensure those fields had black text on a white background, they could write that in their stylesheets.
The second screenshot is obviously more of a concern. Given my experience from many years back, I am guessing that this is a combination of two things:
You can try to fix this by searching for 'colors' in your Options page. Open up the Colors window and adjust as necessary.
For the third screenshot, all I see that's broken is the search button, which is showing an s for 'Search' instead of a magnifying glass icon. It could be down to failing to load the required icon-font that turns 'S' into the magnifying glass, or the font isn't compatible with Mint for some reason.