Why would anyone disable text search?
An attacker who gained access to your Firefox profile directory, copied your Lazarus database, and mounted a dictionary attack on the search index, might be able to figure out some of the words that are in the forms you’ve saved. Lazarus does not store the search index in plain text of course, but first applies a salted hash to every word before indexing it. The “salt” is randomly generated, but is stored unencrypted, which means that if an attacker steals that as well, they can use it to mount a dictionary attack against the words in the index, and eventually discover some of the words that you have entered into forms. The locations of the forms will still be secure if you are using a password for Lazarus If you’re worried about this, you should turn off the text indexing.