## Design estimate - **Complexity:** small (1 day) - **Uncertainty:** high (2.0) - parts of this task depend on tpo/applications/tor-browser#41187, which is on review - **Total:** 2 days (12 hours) - **Actual:** 4h 43m ## User story As a user of Tor Browser who lives in a place where regular bridges are blocked <br>I want to know when a bridge line that I added manually is valid <br>So I can request another one if necessary ## Opportunity statement Since Tor Browser for Android is a relatively new app in comparison to its version for desktop, it still waits for some advanced improvements. Considering that Tor Browser for desktop currently has real time validation of bridge lines added by users, we should bring this to Android as well, so users can recognize invalid bridge lines that won't help them bypass censorship. ## Design scope - Add visual feedback for invalid bridge lines ## Mockups [Figma file](https://www.figma.com/design/4XiUaZPch3ejewlZO56lkR/Tor-Browser-14.5?node-id=587-35340&t=gnIYRwskE7ccwKbd-1)  ## Acceptance criteria ### Scenario 1 - Invalid bridge addresses<br> Given the user pastes at least one invalid bridge addresse in the "Add/Replace bridges" flow<br> When they tap on the Check icon to save the bridges<br> Then an error feedback is displayed ### Scenario 2 - Valid bridge lines Given the user pastes only valid bridge addresses in the "Add/Replace bridges" flow<br> When they tap on the Check icon to save the bridges<br> Then the browser saves them<br> And displays a success feedback