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Joined 1 year ago
Cake day: June 13th, 2023
  • MrOtherGuy@lemmy.worldtoFirefox@lemmy.ml•[Solved] Transparent page background without affecting content
    1·
    20 days ago

    Yeah, !important doesn’t affect inheritance in any way. It only means that this particular rule is to be used if there are multiple rules that would set that particular property for the element in question (unless there’s some other more specific rule with !important tag as well). MDN lists property inheritance in the formal definition section. You can totally make background-color inherited though - like *{ background-color: inherit } (and then set the property to something else on the root element from which you would want to inherit from) but it would then either not apply if website set it to anything else for an element or override any other set value if you used !important tag.

    One other thing worth noting is that I would not recommend the rules mentioned for userChrome.css to be used as is - at least on Windows they completely break Firefox startup - it fails to display any window if you do that. Instead you should add a [sessionrestored] selector to wait a bit before those rules are applied to main-window:

    #main-window[sessionrestored], #tabbrowser-tabpanels{ background: transparent !important; }
  • MrOtherGuy@lemmy.worldtoFirefox@lemmy.ml•[Solved] Transparent page background without affecting content
    1·
    20 days ago

    Right, background-color is not an inherited property (compared to for example color (color of text) which is). But even if it were, inheritance is not “enforced” so if website css sets a backround-color specifically for that element then the inherited value would be lost anyway.

    But the way you now describe it doesn’t seem possible. There is not syntax to apply style rule to “just the innermost element”. I think the closest would be to have everything else have fully transparent background, but the html root element have only partial transparency:

    *{
  background: transparent !important;
}
html:root{
  background: #00000080 !important;
}

    However, you will still face a problem; many websites draw graphics or images as a background-image so if you use the background shorthand property then those graphics will be effectively removed. On the other hand, if you instead set just background-color then parts might get opaque again because a website could be drawing even opaque backgrounds as background-image instead of background-color.

  • MrOtherGuy@lemmy.worldtoFirefox@lemmy.ml•[Solved] Transparent page background without affecting content
    1·
    20 days ago

    I think the answer depends on which elements exactly you want to make transparent. The page is a layered structure. The html root element is behind them all. Then body element is on top of that, the rest of the elements on top of body, etc.

    So if you intend to have transparency all the way down, then you need to make sure that all the elements in that stack are transparent. If any single item in a stack has an opaque background then the transparency effect stops at that.

    As an example, if you set background:transparent to just body but not the document root element, then body will indeed be transparent, but it does not matter because the root will still be opaque. Likewise, if root is made transparent, but there is any opaque layer on top of that, then only the parts of the root element that are not covered by that opaque layer will show up as transparent. If you have a glass table and put a sheet of paper on top of it, then you don’t see through the part covered by the paper even though the table itself is transparent.

  • MrOtherGuy@lemmy.worldtoFirefox@lemmy.ml•[Solved] Transparent page background without affecting content
    2·
    20 days ago

    I don’t think I understand exactly what parts you want to make transparent, but this does work:

    1. set browser.tabs.allow_transparent_browser to true
    2. in userChrome.css add #main-window, #tabbrowser-tabpanels{ background: transparent !important; }
    3. in userContent.css add html:root{ background-color: transparent !important; }

    The above would make window background, and the are behind web-content transparent as well as background of html documents - otherwise the background of browser area wouldn’t show up anyway. Toolbars that have their own specified colors would still be colored - which might be opaque or not depending what theme you have selected.