Some time ago, we started using the <abbr> tag for providing a way to see the full text of an acronym or abbreviation.

However, at some point in the development of #1138, we realized that even though it is a native HTML tag, it might not be as accessible as we originally believed. In fact, the doubt arose when considering keyboard users: how can they ask the browser to show the title attribute? By default, they can't.

Having a look to tests recently made by Adrian Roselli, it can be seen that, among other issues, it's commonly problematic for keyboard and touch users. In Adrian's words:

Exposure continues to be inconsistent across browsers and assistive technologies. Some set of users will always miss some piece of information.

In addition, such an element increases the risk of overusing it by encouraging us to over explain acronyms, as @dgdavid almost did with Btrfs, which he wanted to wrap into an abbr tag. As other examples, XFS and USB are acronyms but it isn't actually helpful for readers to being able to read Extended File System and Universal Serial Bus in the context in which they are used. Similar happens with LVM: if users do not know the technology it represents, reading Logical Volume Manager hardly can help them.

Thus, it's better to stop using <abbr /> and evaluate each particular case when an acronym is added to the UI. If its long version could be helpful for users we should follow the Adrian recommendation:

Explain abbreviations, acronyms, initialisms, numeronyms, etc. on first use and then feel free to fall back to the shortened form.

It could be the case of "Full Disk Encryption (FDE)".

Click to show/hide some screenshots

Please, note that they could be a bit outdated after applying review suggestions.

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Before

Storage Proposal	Encryption Settings	Installation Finished

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After

Storage Proposal	Encryption Settings	Installation Finished