[Mobile][IOS] Files larger than 100 MB cannot be are uploaded using the Safari mobile browser

[Affected versions]:

• Safari for IOS 13.5.1
• Safari for IOS 12.4.6
• Firefox for IOS 27.0 (18428)

[Affected Platforms]:

• IOS 13.5.1 (iPhone 7+, iPhone Xr)
• IOS 12.4.6 (iPhone 5s)

[Prerequisites]:

• Have the “https://send2.dev.lcip.org/” page opened.
• Be logged with a valid Firefox account.

[Steps to reproduce]:

1. Tap the “Select files to upload” button.
2. Select a file larger than 100 MB.
3. Tap the “Upload” button.
4. Observe what happens.

[Expected result]:

• The “Your file is encrypted and ready to share” card is displayed.

[Actual result]:

• The "Something went wrong" card is displayed.

[Notes]:

• We have managed to reproduce this issue on 3 different iOS devices.
• The issue is not reproducible on Desktop using Safari browser 13.1.2.
• The issue is not reproducible on Android 7 using the Native browser.
• Attached is the screen recording with the issue: https://drive.google.com/file/d/1cscOF0j51YVUDTSyGg8J8WQC-y8ounj0/view?usp=sharing