Please double-check your version of Firefox and, assuming you are running Firefox 68.0 (the version which introduced the security restriction causing the problem), please try the instructions again.
The privacy.file_unique_origin preference does exist in my own Firefox 68.0 browser and the solution I posted worked for myself and another user in this forum thread.
Please also see the screenshot attached to this post which shows the privacy.file_unique_origin preference in the about:config section of my own Firefox browser.

That's certainly very strange.
Here are a couple of things to try which might help to pinpoint the cause of your problem.

(1) Try completely disabling any third-party security software that you might have installed (e.g. Avast or AVG), including real-time protection and ransomware detection, before attempting to open JuiceboxBuilder-Pro to see if this might somehow be interfering with JuiceboxBuilder-Pro's functionality.
(Please do so at your own risk and be sure to disconnect from the internet first.)

(2) Check the exact time that the splash page disappears (JuiceboxBuilder-Pro crashes) and then take a look at the Windows Event Viewer to see if there are any entries in the 'Windows Logs -> Applications' or 'Windows Logs -> System' sections which coincide with the crash and give more information on the nature of your problem.
Please see this web page for more information on the Event Viewer: https://www.howtogeek.com/123646/htg-ex … an-use-it/

(3) Also, I'd try completely uninstalling and then reinstalling both JuiceboxBuilder-Pro and Adobe AIR following the procedure outlined in this forum post to see if this helps.

Hopefully these suggestions will help (or at least point you in the right direction.)

First of all, I should note that the information contained in this thread is now out of date.
In Juicebox v1.3.0 (released 16 April 2013), thumbnail configuration options were changed to:
showThumbsButton (Lite & Pro)
showThumbsOnLoad (Pro only)
showSmallThumbsButton (Pro only)
showSmallThumbsOnLoad (Pro only)
(This is noted in the Version history page.)

showThumbsButton still applies to Juicebox-Lite as it did before (the option to display the Thumbnail Button on the gallery's Button Bar to allow the user to toggle the thumbnails on and off) but the only way to completely disable thumbnails is to use Juicebox-Pro and to set the following options:
showThumbsButton="FALSE"
showThumbsOnLoad="FALSE"
showSmallThumbsButton="FALSE"
showSmallThumbsOnLoad="FALSE"

Unfortunately, there are no configuration options that you can set to achieve this functionality.
You would need to create your own custom HTML input box and use the Juicebox-Pro API (specifically the showImage(index:int) method) to show the image corresponding to the number entered into the box.
You can see this in action in the Juicebox-Pro API online demo gallery here.
Enter an image number in the 'Show Image' input box and click the 'Show Image' button.
The code for this would look something like the following:

<script type="text/javascript" src="jbcore/juicebox.js"></script>
<script type="text/javascript">
    var jb = new juicebox({
        containerId: "juicebox-container",
        galleryHeight: "400",
        galleryWidth: "600"
    });
    $(document).ready(function() {
        $('#show').click(function() {
            var value = parseInt($('#index').val(), 10);
            var total = jb.getImageCount();
            if (isNaN(value) || value < 1 || value > total) {
                alert('Please enter an integer between 1 and ' + total + ' (inclusive).');
            } else {
                jb.showImage(value);
            }
        });
    });
</script>
<div id="input">
    <input id="index" type="text" />
    <span>&nbsp;</span>
    <input id="show" type="button" value="Show Image" />
</div>
<div id="juicebox-container"></div>

This might not be easy to integrate into a Drupal page, though.
You would likely need to be familiar with the source code for your Drupal theme and the Juicebox module for Drupal (which is an unofficial plugin note written by ourselves).
Perhaps posting your query in the Drupal forum (where those with more familiar with the module and Drupal itself will see it) might prove to be helpful.
I hope this points you in the right direction, though.

Edit:
If you are looking to for your 'Go To' button to select one of several different galleries (rather than to select a specific image within a certain gallery), then please see the Embedding Multiple Galleries support section.
Again, there is no quick and easy solution for this (you'd need to create your own menu links within your Drupal page) but the support section should at least help you to either link to different gallery pages or switch between galleries (using JavaScript) on a single web page. (Integration within Drupal might be difficult.)

If you are looking for a fully automated and customizable method of creating and displaying multiple galleries, then you might like to take a look at another one of our products - Showkase.

Showkase is a PHP web application (installed on your web server rather than your computer) which allows you to create a complete portfolio web site (integrating multiple galleries) online.
Showkase has full support for Juicebox-Pro and the galleries can be created within the application itself in a web browser interface (or created with JuiceboxBuilder-Pro and imported).

You can create Gallery Index pages and have as many galleries listed on each Gallery Index page as you wish.
Each gallery is represented by a thumbnail image with the gallery title displayed below and the gallery is opened when the user clicks on the image.
Demo sites created with Showkase can be found here and a sample Gallery Index page can be found here.
(Please note that although the Showkase navigation menu will include links for all gallery pages, there is no built-in support for selecting a specific image via an input box and this would still need to be implements manually.)

Showkase can also create non-gallery pages (About, Basic and Contact pages) where you can add information about yourself (or any other content you like).
All of this is done automatically within the Showkase interface without the need for any manual coding at all.
You can take a look around the Showkase interface by logging into the Live Demo Admin.

You're welcome!
I hope you get OK on. Just let me know if you run into any difficulties and I'll do my best to help you out.

Galleries created by WP-Juicebox do not use static 'config.xml' files.
All XML data is generated dynamically on-the-fly at the time the gallery is displayed/viewed (so there are no XML files that you can edit manually).
WP-Juicebox generates XML data dynamically to prevent galleries from having to be rebuilt (via a separate user-driven action) when images are added to pages/posts or when image properties (such as titles) are changed.
This behavior is also in keeping with WordPress itself where content is generated dynamically.

As an alternative to using WP-Juicebox, you could create a gallery with JuiceboxBuilder-Pro (so that you have a regular gallery with a 'config.xml' file that you can edit inb a plain text editor) and then embed it into ypour WordPress page/post manually using the baseUrl method of embedding documented here.

(1) Enter your gallery's baseUrl embedding code into a 'Formatting -> Custom HTML' Gutenberg block.

(2) Upload your complete gallery folder to your root directory and use a leading slash in your embedding code paths to denote your root directory. This should work with any permalink structure. For example:

<!--START JUICEBOX EMBED-->
<script src="/gallery_folder/jbcore/juicebox.js"></script>
<script>
    new juicebox({
        baseUrl: "/gallery_folder/",
        containerId: "juicebox-container",
        galleryWidth: "100%",
        galleryHeight: "600",
        backgroundColor: "#222222"
    });
</script>
<div id="juicebox-container"></div>
<!--END JUICEBOX EMBED-->

I hope this helps.

I'm glad you've got it working.
Thank you for letting me know.

After adding the images to your gallery in the media upload window, I expect that you are probably clicking the 'Insert into post' or 'Create a new gallery' button. This will display the images directly within your WordPress page or post (in addition to attaching the images to the page or post, which is all that is required to add the images to your Juicebox gallery).
(Incidentally, the 'Create a new gallery' button refers to a WordPress gallery and this is unconnected to WP-Juicebox.)

The key is to simply close the media window (via the cross in the top right corner) after the images have finished uploading.
(This is noted in the 'Adding Images From WordPress Media Library' section in the WP-Juicebox support page.)
As soon as the images have finished uploading, they will be attached to the page or post and will be displayed in your Juicebox gallery.

I hope this helps.

This is just a short note to let you know that this is a support forum for the Juicebox-Pro web gallery software from SimpleViewer Inc.

From your post above, it sounds like you are referring to a 'JuiceBox' from eMotorWerks, a completely unrelated company to our own (although the product names are the same).

I do not know if they have a forum but anyone who needs to contact eMotorWerks directly for support should be able to do so via their online form here: https://emotorwerks.com/contact

In order for the Back Button to be visible on mobile devices (when Juicebox-Pro displays the gallery in Small Screen Mode), you'll need to set showSmallBackButton="TRUE" (in JuiceboxBuilder-Pro's 'Customize -> Back Button' section).
This should hopefully resolve your problem.

(Please note that the Back Button is displayed only on main image pages and not on thumbnail pages in Small Screen Mode.)

Unfortunately, very recently, desktop browsers have started to block the autoplay of audio (and video).
Firefox, from version 66 onwards, now blocks the autoplay of audio (and a click is required from the user to start the audio).
Likewise, recent versions of Chrome, Opera and Safari also now block the autoplay of audio.
playAudioOnLoad continues to work only in Edge and Internet Explorer 11.

Here are the release notes for Firefox 66 where this change of behavior was first noted: https://www.mozilla.org/en-US/firefox/6 … easenotes/

I have contacted the developers to let them know of this and a note regarding this change should be added to our online support documentation in the next website refresh.

Unfortunately, there is nothing that can be done from within Juicebox to override this new browser functionality.
If a user want to allow the autoplay of audio in a browser, then the browser's settings need to be changed by the user.
Please see this web page for more information regarding Chrome, Firefox and Safari.
Chrome: https://developers.google.com/web/updat … cy-changes
Firefox: https://support.mozilla.org/en-US/kb/block-autoplay
Safari: https://webkit.org/blog/7734/auto-play- … for-macos/

As unfortunate as it is, there is nothing that can be done from within Juicebox to force audio to autoplay in modern browsers any more.

I realise that this may not be the answer that you were looking for but I hope that my notes above at least explain what you have recently been experiencing.

If you are not manually embedding your gallery into an existing web page alongside other content, then you are likely using the 'index.html' web page which is generated by JuiceboxBuilder-Pro (or the Juicebox Plugin for Lightroom).
The gallery's embedding code can be found inside this 'index.html' file (and you can open the 'index.html' file in a plain text editor to view and/or modify the gallery's embedding code).

As an example, open your https://www.roatan.photos/video-slideshows/flowers/blooming/index.html file in a plain text editor and scroll down to line 24 and you'll find the following <script> ... </script> section:

<script>
    new juicebox({
        backgroundColor: "rgba(0,0,0,1)",
        containerId: "juicebox-container",
        galleryHeight: "100%",
        galleryWidth: "100%"
    });
</script>

It is this section of code that you should replace with one of the suggested code samples from my post above.
I've added your custom background color and gallery dimensions to the code samples above so you can just do a quick copy and paste without too many modifications. Just change the URL that you want to open when the last image has been reached in the following line of code:

window.location.href = 'http://www.example.com'; line.

So basically, just replace the code between the <script src="jbcore/juicebox.js"></script> tag and the opening <div id="juicebox-container"> tag in the gallery's 'index.html' file with one of the code samples above.