Addertjes Onder Het Gras / hiaten

This web page shows some downsides I found in software packages. Each of them, on their own, can cause major troubles to newbies trying to use the software. For more experienced people they spoil the fun using the software and often cause headaches. Some issues may exist by incident, some may be caused by policy of the software author. As soon as an issue is gone to my knowledge, it will be striked out from this website. Known workarounds will be listed too, as long as they are required.
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???Mozilla Firefox / JS Print Setupweb Firefox 64 voids existing Live Bookmark usage

Firefox 64 voids existing Live Bookmark usage

This can force the user to resort to external cloud solutions, such as a Google Chrome-account, for sharing bookmarks inbetween several computers, rather than safely handling this privately. Since October 2019 this even applies to Firefox ESR. The Livemarks-plugin provides a reasonable alternative, though it would be nice if fully automatic migration could be offered, preventing the kind of steep learning curve of finding the "Options" screen belonging to this specific add-on in order to import the OPML-file exported by the Firefox-installer, especially since the "Options"-menu option disappears on Firefox-installations that permanently run in in-private mode and because the "Import"-file selection screen does not offer an "*.opml" file filter pattern.
firefox_oldaddons.pngfirefox_oldaddons2.pngKeeps obsoleting older plugins, prohibiting use of JS Print Setup on Firefox 57 (Quantum)

Keeps obsoleting older plugins, prohibiting use of JS Print Setup on Firefox 57 (Quantum)

Pale Moon (safest choice due to continued updates) together with manual .xpi-addon installation, or Firefox Extended Support Release (ESR) V52.7.3 can be used to avoid this, while disabling automatic updates for Firefox and for add-ons, at the expense of exposing security risks. It should be technically possible for the Firefox developers to let the user choose to keep using the many older SDK plugins, at a cost of performance loss. Another solution could be to use the semifree/semicommercial operating-system-based QZ Tray printing software, that can communicate with the webbrowser through Java, at the expense of a couple of additional programmering hours. While this will avoid Firefox-addons altogether, it introduces a Java dependency and it risks small differences between what's the screen content in Firefox as compared to the printed results, depending on whether the direct-HTML or pixel-capture technique would be used.

qz.io/wiki/2.0-Pixel-Printing#html-printing

JS Print Setup not compatible with Quantum

jsprintsetup not compatible with Quantum

How to Revert to Older Version of Firefox

How to Download Installable Add-on Files (.XPI)

Installing add-on from .xpi-file in Firefox 52.7.3 ESR or Pale Moon

Installing add-on from .xpi-file in Firefox 52.7.3 ESR or Pale Moon