Pale Moon - Your browser, Your way

Known issues in the current version

Development notes

The Pale Moon browser, at any point in time, may have a number of known issues. These known issues will usually be addressed in the next release of the browser, or it may be something that people have noticed and are mentioned here because they are "by design", i.e.: issues people have asked about, are known, and are this way on purpose.
For each issue, check the status for intended action to be taken in development (if any) and intended timeline (if applicable).

Known issues in 24.7.1:

None at this time

Known issues in all versions:

  1. The browser creates directories under %APPDATA%\Mozilla, specifically Mozilla\Extensions
    These directories are related to the underlying Mozilla extension code (Pale Moon is a Mozilla-based browser) and stores extension IDs there. This issue is completely harmless and non-breaking; in fact, having (all) Mozilla-based applications use this one central location for extension IDs is desired.
    Status: [By Design]

Known issues in previous versions

Because issues in previous versions may still apply to what people are running, here is a recap of previous, still recent versions that have been fixed, and potential workarounds:

  1. Rendered text color may become the wrong color or white when scrolling
    In some situations, colored fonts may become the wrong color or white when scrolling and hardware acceleration is enabled in the browser.
    Workaround: set layers.force-active to true in about:config
    Status: [Fixed]
    Timeline: Fixed in 24.7.1
  2. Google Maps on displays a non-functional preview of the "new" maps.
    This is caused by interpretation of the custom user agent in Pale Moon for the domain.
    Workaround: see
    Status: [Fixed]
    Timeline: Fixed in 24.7.1
  1. Domain highlighting sometimes works and sometimes doesn't
    This is caused by a conflict with domain highlighting and the code to have status indicators in the address bar.
    Workaround: Disable domain highlighting in the status bar options
    Status: [Fixed]
    Timeline: Fixed in 24.7.0
  1. After upgrading from 24.5 or before, the browser may crash on startup
    On systems where people have previously changed the advanced preference "" or "", 24.6.0/24.6.1 may crash or immediately close upon startup.
    This is caused by a multi-tiered problem in graphics engine selection, which sometimes causes an invalid or incompatible choice to be made by the browser.
    Workaround: Start the browser with SHIFT held down, and in the safe mode dialog box, click "Reset all user preferences to Pale Moon defaults" and then click "Make changes and restart"
    Workaround 2: Start the browser in safe mode (Start with SHIFT, then click "Continue in Safe Mode"), and manually reset all gfx.* preferences in about:config
    Workaround 3: Start the browser in safe mode, and set "gfx.direct2d.disabled" to "true" in about:config
    Workaround 4: Start the browser in safe mode and perform a browser reset from the Help -> Troubleshooting information page.
    Status: [Fixed]
    Timeline: Fixed in 24.6.2
  1. On certain systems, rendering of text and graphics may become "pixelated"
    If you are using Windows 7 SP1 with the (Feb 28th 2013) Windows Platform Update (KB 2670838), or potentially also if you are using Windows 8/8.1, and your system is equipped with a certain legacy ATI/AMD Radeon (specifically an HD3000 or HD4000 series) graphics processor, you may encounter issues with rendering text and graphics in page content, similar to:

    This is caused by the combination of OS, the Platform Update which makes changes to DirectX, and the graphics hardware/drivers in your system. Unfortunately, it's not clear who exactly is to blame, as people keep pointing fingers to others (Microsoft, AMD, Mozilla). Note that the update may also have been installed as a prerequisite for using MSIE 10/11.
    Of note: Later versions of Pale Moon are less likely to display this error than Firefox, but it may still occur.
    See - TL;DR: uninstall KB2670838 or disable azure for content.
    Fixed in 24.6.0.
  2. On some Windows 8/8.1 systems, the browser regularly crashes
    This is caused by a problem in the Gecko rendering engine on the newer version of Direct2D (introduced in Windows 8, 8.1 and through the Platform Update of Windows 7) when hardware acceleration is used.
    Status: [Fixed]
    Timeline: Fixed in 24.6.0.
  1. On some sites, the plugin notification icon may incorrectly show or provide a blank doorhanger
    This is caused by page content removing document nodes and confusing the plugin indicator code. As a result, you will see the following when clicking the plugin indicator:
    Workaround: None
    Status: [Fixed]
    Timeline: Fixed in 24.5.
  1. The download manager panel may pop up in the far bottom-left
    On some installations, the download manager panel may possibly pop up on the bottom left of the browser instead of where the download manager button is. This is caused by a small issue in the default set of controls in the v24.4.0 updated status bar code, confusing the panel by having 2 places to "hang" the panel from.
    I will be fixing this by removing the status bar download control from the "default" set of controls (like in previous versions).
    Workaround: Open the customization window (right-click a toolbar button and select Customize... from the menu) and remove the download manager control you don't intend to use (either the button in the main navigation bar or the control in the status bar) by dragging it from the browser window to the customization window.
    Status: [Fixed]
    Timeline: Fixed in 24.4.2.
  1. Trying to open up the download manager from the download status control doesn't work
    Trying to open up the download manager (either panel or classic window) by clicking on the status bar control for downloads does nothing. This is caused by a small issue in the newly updated status bar code in 24.4.0.
    Status: [Fixed]
    Timeline: Fixed in 24.4.1
  1. When using the classic downloads window, downloads in private windows are not shown
    If you use the classic downloads window and open a Private Browsing (PB) window, there is no easy way to see which downloads are done in the PB window. When checking the downloads, it will open up the (non-PB) classic downloads window which does not have downloads listed from the PB session.
    This is caused by PB windows being implemented after Mozilla moved to the panel-based downloads manager, and there is no check in the classic downloads window if it is called from a PB window or regular window.
    Workaround: In the PB window, open a new tab and type about:downloads in the address bar
    Status: [Fixed]
    Timeline: Fixed in 24.3.0
  2. Geolocation doesn't work in Pale Moon
    This is caused by the Firefox standard geolocation provider (Google Inc.) now requiring an API key to request geolocation coordinates. Only official Mozilla Firefox builds of the code will work.
    Pale Moon will be switching provider to address this issue.
    Workaround: none.
    Status: [Fixed]
    Timeline: Fixed in 24.3.0
  3. The "More information" link for blocked add-ons doesn't work
    Workaround: See
    Status: [Fixed]
    Timeline: Fixed in 24.3.0
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