I've been using Mozilla for web surfing for years. I like your product very much. however, today, going to the web resources found that some of the content is not visible on the screen. a full reinstall has not brought results. tell me, what is the reason?

hi, thanks for reporting this. we are currently looking into this issue in https://bugzilla.mozilla.org/show_bug.cgi?id=1435472

so far it appears to be an issue that only affects users who have turned off cleartype font rendering within their windows settings. so a workaround for the moment would either be to turn cleartype back on or disabling hardware acceleration in firefox: Firefox's performance settings