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I created a new iframe and added a new value in its contentWindow, and changed the src of the iframe like below.

``` (() => {

 const frame = document.createElement('iframe');
 document.body.appendChild(frame);
 frame.contentWindow.testASDF = 'TEST_VAR';
 frame.src = 'http://localhost:5500/test/iframe.html';

 setTimeout(() => console.log('testASDF: ', frame.contentWindow.testASDF), 3000); // I expect 'undefined', but 'TEST_VAR' printed.

})(); ```

I thought the 'testASDF' value would be gone after the iframe loaded the new src, but the value I set remaining even after the iframe loaded anew. In Chrome, it's not reproduced.

It only happens when I set a same-origin iframe src and modify the src synchronously with the line above. For example, the script below doesn't reproduce the problem.

``` (async () => {

 const sleep = (ms) => new Promise((res) => setTimeout(res, ms));

 const frame = document.createElement('iframe');
 document.body.appendChild(frame);
 frame.contentWindow.testASDF = 'TEST_VAR';
 await sleep(1); // asynchronous routine added
 frame.src = 'http://localhost:5500/test/test.html';

 setTimeout(() => console.log('testASDF: ', frame.contentWindow.testASDF), 3000);

})(); ```

Is this a bug or optimization of Firefox?

UA: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:137.0) Gecko/20100101 Firefox/137.0

There are 2 of the same phones on my Google account of the last 3 devices and they keep getting into my account I cha ge my passwords and they still get someone is cloning my devices each has a different ip address can some one help me?

Hi guys,

I'm communicating with some colleagues using S/MIME encrypted messages. I have already imported all the necessary licenses, and all licenses are valid until 2034. I can receive and read all the encrypted messages they sent me, but every time I try to reply or send them (the same people) encrypted messages, the error pops up saying 'End-to-end encryption requires resolving certificate issues'. I already checked all the licenses but couldn't find any issues. Can you suggest some ways to resolve it? Thank you!

Everyday seems like it's a struggle fight for my password fight for my account fight for it everyday changing my account password three times a day it seems excessive but that's what I have to do to keep an email in the last 15 months I've gone through over 250 emails 26 devices all against a criminal organization what can I do

Hi,

Unlike on desktop, Firefox on mobile does not provide users the option of protecting access to their passwords in the passwords manager with a master password (go figure). This is a major security problem for persons such as myself, who have the typically shorter pin for their mobile unlock screen than that which they use to protect their password manager (it would make it almost unusable if I set the mobile unlock pin the master password every time I went to use the mobile!).

So unfortunately, if I am to use Firefox on mobile I have no choice but to disable the password manager currently.

I am signed into a synced Firefox account on my mobile device, which syncs with my desktop Firefox. If I disable the password manager in the mobile device, does that disable the password manager on all devices which are synced with the same account, such as my desktop, or just disable the password manager on the mobile device?

Firefox shows browsing suggestions based on my bookmarks and browsing history even after clearing tabs and history files how do I stop the suggestions based on history and bookmarks

Dear Team,

When my Client device installs From Firefox 102.7.0 ESR to Firefox 128.7.0 from SCCM. (The case is First install the Version 102.7.0 then save the Bookmarks and then uninstall. Second Install the 128.7.0 then check the bookmarks)

user profile Bookmarks are not mapped in Firefox. When I check C:\Users\Tests\AppData\Roaming\Mozilla\Firefox\Profiles I can see the xxxx.defaultesr

I don't understand why the bookmarks are not linked in Firefox. Can you please help? I would be thankful to you if you could share me the .bat script

Thank you

For the last several weeks I have noticed that Firefox on Android is no longer reliably deleting cache/cookies etc on exit. I have verified option to delete browsing history on exit is enabled and and everything excluding downloads is selected to be deleted. I I am no longer consistently signed out of browsing sessions when selecting exit in menu main and restarting Firefox. Most of the time after re-opening Firefox, I am still signed in to various websites. I never had this problem in the past. If I force stop Firefox and clear storage cache, then I am logged out of browser sessions. Please advise if something has changed or if this is a bug.