See comment in gnu/build/icecat-extension.scm.

--- a/toolkit/mozapps/extensions/internal/XPIDatabase.jsm
+++ b/toolkit/mozapps/extensions/internal/XPIDatabase.jsm
@@ -3452,6 +3452,7 @@ const XPIDatabaseReconcile = {
     if (
       newAddon ||
       oldAddon.updateDate != xpiState.mtime ||
+      oldAddon.path != xpiState.path ||
       (aUpdateCompatibility && this.isAppBundledLocation(installLocation))
     ) {
       newAddon = this.updateMetadata(
@@ -3460,8 +3461,6 @@ const XPIDatabaseReconcile = {
         xpiState,
         newAddon
       );
-    } else if (oldAddon.path != xpiState.path) {
-      newAddon = this.updatePath(installLocation, oldAddon, xpiState);
     } else if (aUpdateCompatibility || aSchemaChange) {
       newAddon = this.updateCompatibility(
         installLocation,
option>
</select> <input type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>Wojtek's customized Guix</td><td class='sub right'></td></tr></table>
<table class='tabs'><tr><td>
<a href='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=aa631ea62ed9e417b72c45d8857291130a52debc'>refs</a><a class='active' href='/guix/log/ROADMAP'>log</a><a href='/guix/tree/ROADMAP?id=aa631ea62ed9e417b72c45d8857291130a52debc'>tree</a><a href='/guix/commit/ROADMAP?id=aa631ea62ed9e417b72c45d8857291130a52debc'>commit</a><a href='/guix/diff/ROADMAP?id=aa631ea62ed9e417b72c45d8857291130a52debc'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/ROADMAP'>
<input type='hidden' name='id' value='aa631ea62ed9e417b72c45d8857291130a52debc'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=aa631ea62ed9e417b72c45d8857291130a52debc'>root</a>/<a href='/guix/log/ROADMAP?id=aa631ea62ed9e417b72c45d8857291130a52debc'>ROADMAP</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/ROADMAP?id=aa631ea62ed9e417b72c45d8857291130a52debc&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-05-20 01:58:04 +0200'>2021-05-20</span></td><td><a href='/guix/commit/ROADMAP?id=c0087d33705f53cc3619a1a43a33602aaecc3a8b'>The #guix channel is hosted by Libera Chat.</a><span class='msg-avail'>...<span class='msg-tooltip'>* README (Contact): Update network name.
* ROADMAP: Likewise.
* doc/contributing.texi (Contributing): Likewise.
* doc/guix.texi (After System Installation): Likewise.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>