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Firefox Does Not Load SharePoint Images?

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Posted on by BenKraft

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I am running into an issue in which Edge is able to pull photos from SharePoint, but Firefox (running the same accounts and SharePoint permissions) cannot.

I have a screen with two images, one from a SharePoint site and the other from online. In Edge, they both render perfectly fine:

(The other image's source):

But within Firefox:

The SharePoint photo renders completely blank. Why might this be?

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WarrenBelz 155,565 Most Valuable Professional on at

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Hi @BenKraft,

The first difference here is that the one displaying in FIrefox in an "anonymous" URL (one available to anyone without any login credentials), whereas the other one requires the user to be authenticated to the SharePoint Library it is contained in. This exact behaviour occurs on mobile devices as they cannot "see" any authentications outside the app (the SP URL is "external" looking in rather than a link using '{Thumbnail}'.Large with the Library attached as a Data Source).

I am not an authority on Firefox (far from it), but I suspect the problem is related to Firefox authentication to the SP Library. The easy way to solve this is to link the Library directly to the app, find the ID of the relevant image file and do this (a better idea anyway)
LookUp( Documents, ID = YourItemID ).'{Thumbnail}'.Large

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BenKraft 164 on at

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@WarrenBelz Thanks for this!

To clarify, you're saying that SharePoint is potentially asking for some extra authentication that goes more smoothly in Edge than in Firefox and therefore leads to the image not making it to the app?

I was using the full links since my real application pulls them from Dataverse records (as hyperlinks) to load images dynamically rather than the "image" field type to save Dataverse space. (It also allows for variable filetypes like .gif)

It's cleaner though to use the SharePoint data source, as then I can just store them as integers(?) as long as the context of which SharePoint site they refer to is known.

Is there a reason you do:

LookUp( Documents, ID = YourItemID ).'{Thumbnail}'.Large

Over:
LookUp( Documents, ID = YourItemID ).Thumbnail.Large

Or is it just styling?

Doing this over a direct link means I now might need a helper function like:

GetImage(ID_: Number): Text = (

LookUp([@Documents], ThisRecord.ID = ID_).Thumbnail.Large

)

Is there an easier way to approach this?

(Also, aren't the "Thumbnail" components not just "external links" themselves? Aren't we just doing links again with extra steps?)

Thanks again!

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WarrenBelz 155,565 Most Valuable Professional on at

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Hi @BenKraft,

To answer your various queries: -

As I noted, the "full" SharePoint URL is actually "outside looking in" as far as Power Apps is concerned. In browsers such as Chrome and Edge, as long as the user is also signed into SharePoint, it will resolve fine, however the mobile app cannot see any thing outside its session - I was suspecting Firefox may have the same issue (I do not use it so donot know for sure).

The '{Thumbnail}' is a field (actually 3 - Small, Medium and Large) automatically included in the record when a Library item is retreived, so it is very much "internal" as far as Power Apps is concerned. I have been using it on both browser and mobile apps for many years and it is totally reliable. It can resolve image files as well as Word and PDF, although some other file types do not work.

You do not need any further "Helper" code - the LookUp will work directly.

As an example a number of my apps have photo galleries of job sites and the metadata contains the job number, so I have a Gallery with
Filter( JobLibrary, JobNo = varJob )

where the Variable is set when the job is selected.

I then have an image file with the Image
ThisItem.'{Thumbnail}'.Large

to display all of the photos and then OnSelect of the Image
Launch(ThisItem.'Link to Item')

which opens the full resolution photo. The difference with mobile devices is that this is an "active" command to open SharePoint rather than a "passive" one to resolve an image, so it will prompt for sign-in (if not already) and open the photo.

Please ✅ Does this answer your question if my post helped you solve your issue. This will help others find it more readily. It also closes the item. If the content was useful in other ways, please consider answering Yes to Was this reply helpful? or give it a Like ♥
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