Juicebox-Pro (and WP-Juicebox) can display images returned by the Flickr API using these Flickr Options.

You would need to specify a Flickr User Name, Flickr User Id, Flickr Set Id or Flickr Group Id (filtering images if necessary with Flickr Tags).

I do not think that there is any way to directly fetch only shared images via the Flickr API. I do not see any mention of the term 'share' on the Flickr API overview page: https://www.flickr.com/services/api/

If all the shared images are in the same Flickr account, then you could tag your shared images with the keyword 'shared' and set flickrTags="shared" (along with your flickrUserName or flickrUserId).

Thank you for the additional information.

The problem seems to be a combination of:
(1) An Edge Animate animation
(2) Safari 10 on Mac
(3) The Back Button within Juicebox-Pro

Unfortunately, I am unable to replicate the problem so you may need to try a few things for yourself to see if they work or make a difference.

Essentially, the Back Button just opens a specified page in the user's browser and I'm really not sure how the link itself could affect the content of the page that it links to. It looks like some kind of incompatibility between Edge Animate and Safari 10 on Mac (especially as the phenomenon has not been seen in any other browser). It is a mystery why your Edge Animate page works when opened from your own manual <a> hyperlink but not from the Back Button link in your Juicebox-Pro gallery.

However, here are a few things to check and try:

(1) Try using text instead of the icon for the Back Button to see if this makes a difference.
Set backButtonUseIcon="FALSE" and backButtonText="return jori".

(2) Try using an absolute URL instead of a relative path for your backButtonURL.
Set backButtonUrl="http://www.henricanu.com/testouille/clickautotest/clickautotest-2.html".

(3) Try taking Juicebox-Pro out of the equation and see if the same problem occurs with a dynamically generated link outside of Juicebox-Pro.
Just before the closing </body> tag on your gallery's 'index.html' page, add the following code which will add a dynamic link (like Juicebox-Pro does for the Back Button).

<script type="text/javascript">
    $(document).ready(function() {
        $('body').prepend('<a href="../../testouille/clickautotest/clickautotest-2.html">Link #2</a>');
    });
</script>

In this case, the text for the link will be "Link #2" and the link will appear above your own test link. It will still link to your Edge Animate page. Please try this and see what happens.
If this works, then you could try overriding Juicebox-Pro's own handling of the Back Button.
Try something like this:

<!--START JUICEBOX EMBED-->
<script src="jbcore/juicebox.js"></script>
<script>
    var jb = new juicebox({
        containerId: 'juicebox-container',
        galleryWidth: '100%',
        galleryHeight: '600px',
        backgroundColor: '#222222',
        backButtonPosition: 'OVERLAY',
        backButtonUseIcon: 'FALSE',
    });
    jb.onInitComplete = function() {
        $('.jb-go-back').html('<a href="../../testouille/clickautotest/clickautotest-2.html">return jori</a>');
    };
</script>
<div id="juicebox-container"></div>
<!--END JUICEBOX EMBED-->

This uses the Juicebox-Pro API (specifically the onInitComplete event) to ensure that the Back Button is present in the DOM (Document Object Model) before any actions are performed on it. The code then replaces Juicebox-Pro's own Back Button link code with your own.
If this works, you can then style your custom Back Button with CSS if you like.

(4) You might also like to try giving your Edge Animate container focus as soon as the page is loaded.
Try adding the following code just before the closing </body> tag on your Edge Animate page:

<script type="text/javascript">
    window.onload = function() {
        document.getElementById('EdgeID').focus();
    };
</script>

If you continue to experience difficulties, then you might like to try posting in Adobe's Edge Animate forum to see if any other users have experienced similar issues (Edge Animate animation requiring a click on the page in Safari 10 on Mac when taken to an Edge Animate page via a link).

I hope that these suggestions help or at least point you in the right direction.

I'm not sure if you are using WP-Juicebox (the Juicebox plugin for WordPress) or trying to embed your gallery manually.

If you are using WP-Juicebox and find that the pop-up window does not display the gallery settings when you click the 'Add Juicebox Gallery' button, then please see this forum thread for suggestions.

If you are trying to embed your gallery manually, then I would recommend using the baseUrl method documented here.
Essentially, once you have created your gallery with Lightroom, you would upload the complete gallery folder (not just the contents) to your web server and paste the baseUrl embedding code into the body of your WordPress page or post (ensuring that the method of entry is 'Text' rather than 'Visual'). It does not matter where on your web server you upload your gallery folder to as long as the two paths in the embedding code (the path to the 'juicebox.js' file and the baseUrl itself, pointing towards the gallery folder) are correct.

For example, if your gallery folder is named 'my_gallery_folder' and you upload it to the root directory of your web space, then you could use the following embedding code. The leading slashes in the paths denote your root directory so this code will work in any web page throughout your site without modification (although you can change the gallery dimensions and background color if you like).

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

If you have trouble with WordPress adding <br> and <p> tags throughout the code, install the Raw HTML plugin and wrap the code in [raw] ... [/raw] tags.

I hope these notes help.
However, if you continue to experience difficulties, please post back with a link to your gallery's web page so that I can see the problem for myself and hopefully help further.

I have tested your setup in Chrome 54, Edge, Firefox 49.0.1, Internet Explorer 11 and Opera 40 on my PC.
Every time I single-slick your gallery's Back Button, the animation on your Edge Animate page is active without having to click anywhere on the page. It works in all browsers for me.

The Back Button is essentially just an <a> tag (like your manual link) which is generated dynamically by the 'juicebox.js' file when the gallery is displayed (although this should make no difference).

Maybe some additional information would help to track down the cause of the problem.
What version of Safari do you use?
Do you have any browser extensions installed? If so, try temporarily disabling them to see if this helps.
Try completely clearing your browser's cache before reloading your website to see if this makes a difference.
Also, try other browsers to see if the problem is unique to Safari.

Hyperlinks operate with a single-click and, as far as I'm aware, there is no way to simulate a double-click on the Back Button when a user single-clicks it.

Tapping the screen on an iPhone toggles the overlay on and off by default (you can override this behavior by setting showInfoButton="TRUE") but tapping a button on the Button Bar should certainly still work. If you have a gallery where this does not work, please post a link so that I can investigate further. (I have just viewed the gallery whose link you posted and the Button Bar buttons seem to function fine on my own iOS device.) Also, check to see if you have any custom CSS which might be overriding the gallery's own CSS.

Instead of using a <form> tag, try using a regular <a> tag instead. You can then style the content of the tag using CSS.
This should hopefully work. (The <a> tag link in the first image in this demo gallery works on my iPod Touch.)

No problem.
I'm pretty sure Ryan should be able to help you out with the use of hook_juicebox_gallery_alter() over in the Srupal forum.

Normally, to give each gallery a different audio track, you would just assign each gallery different audioUrlMp3 and audioUrlOgg values.
For reference, a list of all Audio Options can be found here.
Please also see the Adding Audio Support section.

The hook_juicebox_gallery_alter() method is unique to the Juicebox module for Drupal. It is not part of Juicebox itself.
The Juicebox module for Drupal is an unofficial plugin which was not written by ourselves and, as such, I am not familiar with hook_juicebox_gallery_alter().
I would recommend that you post your query in the Drupal forum where the author of the module should be able to help you further. (The module is well supported by its author over there.)

I realise that this may not directly answer your query but I hope it points you in the right direction.

Unfortunately, Google (who acquired Picasa) do not seem to allow access to new Google Photo Albums via the Picasa Web API although existing albums created prior to the acquisition can still be displayed via WP-Juicebox (as long as they have not been modified recently).

This is by design. When the 'Open Image' button is clicked for a Flickr gallery, the image's Flickr page is opened.
There is no way to change this behavior using any available configuration options. The code which handles this is buried deep within the 'juicebox.js' file which is obfuscated and cannot be modified.

All I can suggest at the moment is to perhaps suggest this alternative action for the 'Open Image' button in the Feature Requests forum thread.
This keeps all the ideas together and ensures that they are not overlooked by the developers.
I do not know the likelihood of any suggestions being implemented but this is certainly the best place for all ideas.
Thank you.

You're correct. Sorry. The link pointed towards the Showkase forum Feature Requests thread in error. Thank you for pointing this out.
I've fixed the link now so that it points correctly towards the Juicebox forum Feature Requests thread (http://juicebox.net/forum/viewtopic.php?id=5). I'm glad you found the right thread. Apologies for any inconvenience caused.

@borut.podlipnik

You can change the shape of the thumbnails with thumbWidth and thumbHeight (via the 'Thumb Width' and 'Thumb Height' sliders in the 'Thumbnail' control panel). They do not need to be square but they will all be the same size as each other.

The thumbnails exported by Lightroom are not cropped (as you have discovered). Lightroom uses the thumbWidth and thumbHeight values as maximum bounds when resizing the images and their aspect ratios are respected.
However, Juicebox will always dynamically scale the thumbnail images to fill the thumbnail dimensions (with cropping if the aspect ratios do not match) when the gallery is displayed.
Even though JuiceboxBuilder-Pro crops thumbnails to the exact thumbnail dimensions and Lightroom does not, if you view galleries (built with JuiceboxBuilder-Pro and Lightroom) with the same thumbWidth and thumbHeight values, the galleries (and thumbnails in particular) will look the same.
There is no way to change this.

The only thing you could do is create your own set of scaled-to-fit thumbnail images (in Lightroom, Photoshop or another imaging program) and replace the ones in the 'thumbs' folder.
Please bear in mind that it would still not be possible to have thumbnail images of different sizes. All thumbnail images will be displayed at the thumbWidth and thumbHeight dimensions. If you have images of varying aspect ratios, you may need to pad your thumbnail canvas with blank space (at the top and bottom or left and right) to fill the thumbnail dimensions.

If you like, you can post suggestions for future versions in the Feature Requests forum thread.
This keeps all the ideas together and ensures that they are not overlooked by the developers.
I do not know the likelihood of any suggestions being implemented but this is certainly the best place for all ideas.
Thank you.

It is not possible to have the shared image's thumbnail displayed in the pop-up Facebook share window due to limitations imposed by Facebook on what data can be passed via their share URL. Only one thumbnail image can be used per web page. However, the shared link will still point towards the correct image within your gallery, though.

The image used in the pop-up Facebook share window is set using an Open Graph og:image meta tag in the <head> section of your web page, such as the following:

<meta property="og:image" content="http://www.example.com/images/thumbnail.jpg" />

Please see here for more details on the Open Graph protocol.

You can think of the og:image as being representative of the gallery as a whole so you could use an image which best represents your gallery. (The og:image does not need to be an image from the gallery.)

If you create a gallery with JuiceboxBuilder-Pro, an og:image meta tag will be automatically generated and included in the gallery's 'index.html' file (pointing towards the first image in the gallery). If you are embedding your gallery in an existing web page alongside other content, then you will need to add an og:image meta tag manually.

Although the thumbnail image displayed in the pop-up Facebook share window will always be the same one (specified via the og:image meta tag), the link being shared will still point correctly towards the shared image in the gallery. You should notice that the URL being shared ends with something like #2 or #17 where the number represents the image in the gallery. When a user clicks on a shared link, the corresponding shared image will be opened in the gallery.

If you really wanted to override Juicebox-Pro's click handler for the Facebook share button, you could try something like the following which will allow you to run your own custom JavaScript code when the Facebook share button is clicked.

<script src="jbcore/juicebox.js"></script>
<script>
    var jb = new juicebox({
        containerId: "juicebox-container",
        shareFacebook: "TRUE"
    });
    jb.onInitComplete = function() {
        $('.jb-bb-btn-facebook').off('click');
        $('.jb-bb-btn-facebook').click(function() {
            // Custom JavaScript code to be run when Facebook share button is clicked goes here
        });
    };
</script>

This uses the Juicebox-Pro API (specifically the onInitComplete event) to ensure that the Facebook share button is present in the DOM (Document Object Model) before any actions are performed on it.

Please note that Juicebox-Pro was not designed with this functionality in mind (user overrides for Button Bar buttons) and whilst you are free to use such modifications, they are not officially supported (and you may run into unforeseen problems that might have to be tackled along the way).