firefox: wrapper updating an addon perserves addon settings

1 files changed, 2 insertions, 2 deletions

diff --git a/doc/builders/packages/firefox.section.md b/doc/builders/packages/firefox.section.md
index 28fa3f0dbd7c0..acf31e188c3ee 100644
--- a/doc/builders/packages/firefox.section.md
+++ b/doc/builders/packages/firefox.section.md
@@ -9,7 +9,7 @@ The `wrapFirefox` function allows to pass policies, preferences and extension th
   myFirefox = wrapFirefox firefox-unwrapped {
     nixExtensions = [
       (fetchFirefoxAddon {
-        name = "ublock";
+        name = "ublock"; # Has to be unique!
         url = "https://addons.mozilla.org/firefox/downloads/file/3679754/ublock_origin-1.31.0-an+fx.xpi";
         sha256 = "1h768ljlh3pi23l27qp961v1hd0nbj2vasgy11bmcrlqp40zgvnr";
       })
@@ -42,7 +42,7 @@ The `wrapFirefox` function allows to pass policies, preferences and extension th
 If `nixExtensions != null` then all manually installed addons will be uninstalled from your browser profile.
 To view available enterprise policies visit [enterprise policies](https://github.com/mozilla/policy-templates#enterprisepoliciesenabled)
 or type into the Firefox url bar: `about:policies#documentation`.
-Nix installed addons do not have a valid signature, which is why signature verification is disabled. This does not compromise security because downloaded addons are checksumed and manual addons can't be installed.
+Nix installed addons do not have a valid signature, which is why signature verification is disabled. This does not compromise security because downloaded addons are checksumed and manual addons can't be installed. Also make sure that the `name` field of fetchFirefoxAddon is unique. If you remove an addon from the nixExtensions array, rebuild and start Firefox the removed addon will be completly removed with all of its settings.
 
 ## Troubleshooting {#sec-firefox-troubleshooting}
 If addons do not appear installed although they have been defined in your nix configuration file reset the local addon state of your Firefox profile by clicking `help -> restart with addons disabled -> restart -> refresh firefox`. This can happen if you switch from manual addon mode to nix addon mode and then back to manual mode and then again to nix addon mode.