src/vs/workbench/contrib/terminal/browser/terminalInstance.ts/TerminalInstance/updateAccessibilitySupport
class TerminalInstance:	updateAccessibilitySupport(): void {
		const isEnabled = this._accessibilityService.isScreenReaderOptimized();
		if (isEnabled) {
			this._navigationModeAddon = new NavigationModeAddon(this._terminalA11yTreeFocusContextKey);
			this.xterm!.raw.loadAddon(this._navigationModeAddon);
		} else {
			this._navigationModeAddon?.dispose();
			this._navigationModeAddon = undefined;
		}
		this.xterm!.raw.options.screenReaderMode = isEnabled;
	}