In my manifest file I have both tabs and activeTab permssion. I'm trying to obtain the current tab id from my content script, here is what I'm doing:

  console.log("here");
  browser.tabs.getCurrent()
    .then(getTab)
    .catch(reportTabError);
    function reportTabError(error) {
      console.error(`Could not process: ${error}`);
    }       
    function getTab(tabInfo){
      console.log("here 2"); //this never fires
      window.currentTabId = tabInfo.id;
    }

I also did a different version, same result:

  console.log("here");
  browser.tabs.query({currentWindow: true, active: true})
    .then(getTab)
    .catch(reportTabError);
    function reportTabError(error) {
      console.error(`Could not process: ${error}`);
    }       
    function getTab(tabInfo){
      console.log(tabInfo.id); //this never fires
      //window.currentTabId = tabInfo.id;
    }

The overall idea is to store the active tab IDs for a possible future update. What I want to achieve is to eventually notify all open tabs that the user changed the settings in the option page, and to update the interface loaded in the tabs accordingly.