I2P_in_Private_Browsing_Mode_for_Firefox/scrub.js

var contextScrub = async function(requestDetails) {
  console.log("(scrub)Scrubbing info from contextualized request");
  try {
    var headerScrub = function(context) {
      if (!context) {
        console.error("Context not found");
      } else {
        if ((context.name = "i2pbrowser")) {
          var ua = "MYOB/6.66 (AN/ON)";
          for (var header of requestDetails.requestHeaders) {
            if (header.name.toLowerCase() === "user-agent") {
              header.value = ua;
              console.log("(scrub)User-Agent header modified", header.value);
            }
          }
          return {
            requestHeaders: requestDetails.requestHeaders
          };
        }
      }
    };
    var contextGet = async function(tabInfo) {
      try {
        console.log("(scrub)Tab info from Function", tabInfo);
        context = await browser.contextualIdentities.get(tabInfo.cookieStoreId);
        return context;
      } catch (error) {
        console.log("(scrub)Conext Error", error);
      }
    };
    var tabGet = async function(tabId) {
      try {
        console.log("(scrub)Tab ID from Request", tabId);
        let tabInfo = await browser.tabs.get(tabId);
        return tabInfo;
      } catch (error) {
        console.log("(scrub)Tab error", error);
      }
    };
    if (requestDetails.tabId > 0) {
      var tab = tabGet(requestDetails.tabId);
      var context = tab.then(contextGet);
      var req = await context.then(headerScrub);
      console.log("(scrub)Returning I2P Proxy", req);
      return req;
    }
  } catch (error) {
    console.log("(scrub)Not using I2P Proxy.", error);
  }
};

browser.webRequest.onBeforeSendHeaders.addListener(
  contextScrub,
  { urls: ["<all_urls>"] },
  ["blocking", "requestHeaders"]
);