This fixed the issue of the Add-on not persisting after restarts and/or not loading in open compose windows and/or not functioning until a restart.

Changes since v1.0.14

v1.0.15

Removed the unsupported "windows" permission.

Reverted to using only browser.scripting.compose.registerScripts to inject our toolbar.css (no manual injection loops).

Simplified the background script: on click, directly execute the strikeThrough command.

v1.0.16

Updated strict_min_version to 128.0 (Manifest V3 requirement for TB 128+).