Virus warnings:
As JH said already, some of the more powerful extensions (like ExtManager, itself an extension) are created with AutoIt and compressed with
UPX. This upx format is the prob, it has always been infamous for getting false positive alerts if scanners cannot look inside. Not because they detected anything, just because they cannot check it. At any rate that's what their authors explained here in the past while still being around, personally have no clue of such stuff.
Just a note for readers who may not be aware:
K-Meleon extensions can also be installed WITHOUT needing any manager at all (just by dropping their files into matching folders, with a file manager).
The purpose of ExtMgr is only to provide a GUI to make things a bit easier, especially for people who are used to have such managers ;-) And it's meant mainly for bigger extensions with a bunch of files in several folders, just as reminder which ones. But ExtMgr can only work anyway if the extension author included a special little file list for it, /kmextensions/*.ini Other extensions without such a file will not show up in it anyway.
KM uses different extension types, which are managed in different places:
ALL installed
kmm-macros are listed and switchable in
F2 > KM Plugins > Macro Extension. A whole bunch comes already included out-of-box, most are necessary for core functions.
Some extensions contain a kmm-macro with a bunch of other files. Those "other files" are not listed anywhere - except if author included a little info file for kmextensions/*.ini, meant only for this ExtManager. In general it's a good idea to
keep the original 7z-packages somewhere, to later remember which files came with it, when wanting to
uninstall them again.
By the way all
younger extensions from recent years are only posted here in the forum. KMEXT would be handy but sadly not maintained anymore since years.
KM's native own plugins in folder "
KPlugins" show up in F2 > KM Plugins, and can be toggled there. But cautious when disabling, most are also needed for normal function. Regarding user extensions, almost none available which add any kplugins, just perhaps 1-2 in the far past.
KM also uses global
SYSTEM Plugins automatically, those show up in Help > About Plugins. But this page is only for info, not for toggling. I assume there's probably a config for those in one of the "about:" pages in younger KM-versions, but not quite sure (stuck on older version myself). And MimeType configs...
But in general system plugins can also be toggled on "about:config" page, filtering for "plid" prefs. For example in older KM-versions setting pref "
plugin.scan.plid.all=false" disables all global system plugins, except those which have an own pref and it's set to true. In younger KM versions it's more complicated, involving more prefs for better finetuning. Test&See is often the motto for KM ;-) But better make a
backup copy of profile folder first, or at least file "prefs.js".
.
A "younger" extension type for KM are
XPI-Addons, adopted from Firefox/PaleMoon. But sadly without expert updates only very few actually work in KM too - and the main prob is: hardly any experts around anymore, rather none
(roytam is only working on engine stuff) So today the rest of us here can only fix a bit easy stuff ourselves, mainly create menulines or buttons but only for simple stuff like toggling prefs or opening URLs. Best chance for xpi "addons" is searching here in forum, chapter extensions, if in the past an addon was already adopted.
For managing XPI-addons, those show up in page "
about:addons" like in Firefox too. That whole module is so far only inherited unmodified from the engine, not adjusted for KM-shell, so not everything works in KM too (e.g. forget about "Themes" here, KM uses own skins, posted in "Graphics" subforum). Probably due to this "unfinished" state KM doesn't include yet a menu to open such engine configs. But no prob, to get a menu, users can download tiny macro "AboutAbout" and edit it as wished (and I hope some day someone with FF experience can make a little list which of the many about-pages make sense in KM and which not yet).
(Side note: page "
about:about" shows the big config package "inherited" from the engine. Same module as in other related browsers, but attention:
not converted for KM yet! So don't trust those settings too blindly since not all apply to KM-shell too. KM has it's own traditional config which opens with
F2-key, and a bit other stuff shattered in menus)
If such an XPI-addon cannot be "uninstalled" on page "about:addons", that usually just means the xpi-file is not placed in the profile, but in KM program folder. To uninstall just remove that xpi-file.