Answers.Body: <p>In Chrome -> all is well: for the exact same url: civicrm/a#/mailing/59 - I get passed the "Loading" -> to a fully loaded Mosaico screen:</p>
  
  <p><a href="https://i.sstatic.net/zxPHO.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/zxPHO.png" alt="enter image description here"></a></p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-08-14T08:53:14.117Z
Answers.Text: Did you try to clear the civicrm cache? This could also be caused by the asset caching, not sure how to clear that cache.
Answers.UserDisplayName: Jaap Jansma - CiviCooP
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-08-14T10:28:55.963Z
Answers.Text: Same URL different browser though; you can disable assett caching in rhe Administer debug settings page and after that run clean CiviCRM caches that’s how they clear out - but that does not fix this. I’ve had other issues with Angular forms (mailing one) with clients using that on iPad (Safari).
Answers.UserDisplayName: KarinG - Semper IT
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-08-14T11:16:33.363Z
Answers.Text: That all sounds to me something wrong with the assets. Maybe try to see what error comes up when your press f12 in firefox (you get the developer part of the browser). You can then see whether javascript gives an error or somesort of document gives a 404 not found http error.
Answers.UserDisplayName: Jaap Jansma - CiviCooP
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-08-14T00:54:44.353Z
Answers.LastActivityDate: 2018-08-14T00:54:44.353Z
Answers.UserDisplayName: KarinG - Semper IT
Answers.Body: <p>The current version produces a "Update your browser!" message - which is not helpful since I already have the latest, and that is not the problem.</p>
  
  <p>Mosaico itself (not just the CiviCRM integration) is picky about the plugins you have installed in your browser.</p>
  
  <p>See <a href="https://github.com/voidlabs/mosaico/issues/383#issuecomment-428911320" rel="nofollow noreferrer">https://github.com/voidlabs/mosaico/issues/383#issuecomment-428911320</a> and <a href="https://github.com/voidlabs/mosaico/issues/312#issuecomment-295278878" rel="nofollow noreferrer">https://github.com/voidlabs/mosaico/issues/312#issuecomment-295278878</a></p>
  
  <blockquote>
    <p>You have the RightToClick extension installed and this extension
    manipulates HTML content. Doing so it would break the email template
    generation. That's why we give that alert.</p>
    
    <p>Any extension that alters html for every iframe in the page is an
    incompatible extension: AFAIK apart RTC extension, the only other
    extensions doing that are spam stuff.</p>
  </blockquote>
  
  <p>So paraphrasing, if they don't like the look of your plugins you are blocked.</p>
  
  <p>Go through your plugins and disable them until you find which one is causing the problem.</p>
  
  <p>In my case, it was the Google Analytics Opt-out Add-on - disable that and it passes the compatibility test.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-08-29T15:10:32.610Z
Answers.LastActivityDate: 2019-08-29T15:10:32.610Z
Answers.UserDisplayName: Aidan
Answers.Body: <p>I had this issue emerge recently with Safari 14.1. Based on the above advice, the fix was to disable the Wayback Machine extension I had recently installed in Safari.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-05-26T02:24:43.383Z
Answers.LastActivityDate: 2021-05-26T02:24:43.383Z
Answers.UserDisplayName: Bryan
Body: <p>Currently on:</p>
  
  <ul>
  <li>CiviCRM - 5.3.1 </li>
  <li>Mosaico - 2.0-beta3.1512698300  </li>
  <li>CiviCRM Bootstrap theme - 0.1-alpha14  </li>
  <li>Flexmailer - 0.2-alpha5</li>
  </ul>
  
  <p>In Firefox 'Quantum' - when hitting Continue on a mailing created this morning civicrm/a#/mailing/59 (with another browser) -> it's stuck "Loading" (see top right) when I hit Edit on the Mosaico Mailing</p>
  
  <p><a href="https://i.sstatic.net/vb55a.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/vb55a.png" alt="enter image description here"></a></p>
  
Tags: <civimail><mosaico>
Title: What browser does Mosaico work in?
ThreadText: # What browser does Mosaico work in?
  
  (Asked by: username_0 on 2018-08-14)
  
  Currently on:
  
  * CiviCRM - 5.3.1
  * Mosaico - 2.0-beta3.1512698300
  * CiviCRM Bootstrap theme - 0.1-alpha14
  * Flexmailer - 0.2-alpha5
  
  In Firefox 'Quantum' - when hitting Continue on a mailing created this morning civicrm/a#/mailing/59 (with another browser) -> it's stuck "Loading" (see top right) when I hit Edit on the Mosaico Mailing
  
  [![enter image description here](https://i.sstatic.net/vb55a.png)](https://i.sstatic.net/vb55a.png)
  
  **Tags:** civimail, mosaico
  
  
  ---
  
  ## 3 answers
  
  ### Answer by username_0 on 2018-08-14. Score: 1 | Accepted answer
  
  In Chrome -> all is well: for the exact same url: civicrm/a#/mailing/59 - I get passed the "Loading" -> to a fully loaded Mosaico screen:
  
  [![enter image description here](https://i.sstatic.net/zxPHO.png)](https://i.sstatic.net/zxPHO.png)
  
  > **Comments:**
  > **username_1**: Did you try to clear the civicrm cache? This could also be caused by the asset caching, not sure how to clear that cache.  
  > **username_0**: Same URL different browser though; you can disable assett caching in rhe Administer debug settings page and after that run clean CiviCRM caches that’s how they clear out - but that does not fix this. I’ve had other issues with Angular forms (mailing one) with clients using that on iPad (Safari).  
  > **username_1**: That all sounds to me something wrong with the assets. Maybe try to see what error comes up when your press f12 in firefox (you get the developer part of the browser). You can then see whether javascript gives an error or somesort of document gives a 404 not found http error.  
  
  ---
  
  ### Answer by username_2 on 2019-08-29. Score: 3
  
  The current version produces a "Update your browser!" message - which is not helpful since I already have the latest, and that is not the problem.
  
  Mosaico itself (not just the CiviCRM integration) is picky about the plugins you have installed in your browser.
  
  See <https://github.com/voidlabs/mosaico/issues/383#issuecomment-428911320> and <https://github.com/voidlabs/mosaico/issues/312#issuecomment-295278878>
  
  > You have the RightToClick extension installed and this extension
  > manipulates HTML content. Doing so it would break the email template
  > generation. That's why we give that alert.
  >
  > Any extension that alters html for every iframe in the page is an
  > incompatible extension: AFAIK apart RTC extension, the only other
  > extensions doing that are spam stuff.
  
  So paraphrasing, if they don't like the look of your plugins you are blocked.
  
  Go through your plugins and disable them until you find which one is causing the problem.
  
  In my case, it was the Google Analytics Opt-out Add-on - disable that and it passes the compatibility test.
  
  
  ---
  
  ### Answer by username_3 on 2021-05-26. Score: 0
  
  I had this issue emerge recently with Safari 14.1. Based on the above advice, the fix was to disable the Wayback Machine extension I had recently installed in Safari.
  
  
  ---
  
  