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* There is a new build variable: MOZ_ALLOW_LEGACY_EXTENSIONS=1. It is currently set to true (1) and has also been put into SeaMonkeys confvar.sh to play it safe. | * There is a new build variable: MOZ_ALLOW_LEGACY_EXTENSIONS=1. It is currently set to true (1) and has also been put into SeaMonkeys confvar.sh to play it safe. | ||
** With this build option set, most legacy extensions (or at least most of those still working in 2.49, see above) are still working even in SeaMonkey 2.54a1, notwithstanding its being built on Toolkit 57.0a1; but the add-ons manager display itself (not the add-ons manager function) is broken on current trunk if [https://addons.mozilla.org/addon/amversionnumber/ the "Add-ons Manager - Version Number" extension] is enabled. This has been checked both with the "current stable" version 1.4 and the "latest development" version 1.4.1beta1 of this restartless extension, which will not be updated for Firefox 57.0 or up. Since this problem is due to an extension, it does of course not happen in Safe Mode. | ** With this build option set, most legacy extensions (or at least most of those still working in 2.49, see above) are still working even in SeaMonkey 2.54a1, notwithstanding its being built on Toolkit 57.0a1; but the add-ons manager display itself (not the add-ons manager function) is broken on current trunk if [https://addons.mozilla.org/addon/amversionnumber/ the "Add-ons Manager - Version Number" extension] is enabled. This has been checked both with the "current stable" version 1.4 and the "latest development" version 1.4.1beta1 of this restartless extension, which will not be updated for Firefox 57.0 or up. Since this problem is due to an extension, it does of course not happen in Safe Mode. | ||
*** P.S. [https://addons.mozilla.org/addon/amversionnumber/versions/beta?page=1#version-1.5beta1 Add-ons Manager - Version Number 1.5beta1], a "development" version published during the night preceding this meeting, fixes the problem. | |||
* Adblock Plus 2.9 is broken in 2.48 and up. 2.9.1 has speed problems and hangs 2.53 and later during shutdown {{bug|1379994}}. It is recommended to use 2.8.2 right now. This implies setting at least this extension to "Update Manually" in the add-ons manager, and disregarding all updates for it until further notice, even if found by the "Check for Updates" function in the add-ons manager rolldown. | * Adblock Plus 2.9 is broken in 2.48 and up. 2.9.1 has speed problems and hangs 2.53 and later during shutdown {{bug|1379994}}. It is recommended to use 2.8.2 right now. This implies setting at least this extension to "Update Manually" in the add-ons manager, and disregarding all updates for it until further notice, even if found by the "Check for Updates" function in the add-ons manager rolldown. | ||