Function majorVersionHasIncreased

background_scripts/main.js:802–808

(previousVersion)

// True if the major version of Vimium has changed.
// - previousVersion: this will be null for new installs.
function majorVersionHasIncreased(previousVersion) {
  const currentVersion = Utils.getCurrentVersion();
  if (previousVersion == null) return false;
  const currentMajorVersion = currentVersion.split(".").slice(0, 2).join(".");
  const previousMajorVersion = previousVersion.split(".").slice(0, 2).join(".");
  return Utils.compareVersions(currentMajorVersion, previousMajorVersion) == 1;
}

// Show notification on upgrade.
async function showUpgradeMessageIfNecessary(onInstalledDetails) {